Sweden-Number/dlls/win32u/window.c

/*
 * Window related functions
 *
 * Copyright 1993, 1994 Alexandre Julliard
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */


#if 0
#pragma makedep unix
#endif

#include <assert.h>

#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "ntgdi_private.h"
#include "ntuser_private.h"
#include "wine/server.h"
#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(win);

#define NB_USER_HANDLES  ((LAST_USER_HANDLE - FIRST_USER_HANDLE + 1) >> 1)
#define USER_HANDLE_TO_INDEX(hwnd) ((LOWORD(hwnd) - FIRST_USER_HANDLE) >> 1)

static void *user_handles[NB_USER_HANDLES];

#define SWP_AGG_NOGEOMETRYCHANGE \
    (SWP_NOSIZE | SWP_NOCLIENTSIZE | SWP_NOZORDER)
#define SWP_AGG_NOPOSCHANGE \
    (SWP_NOSIZE | SWP_NOMOVE | SWP_NOCLIENTSIZE | SWP_NOCLIENTMOVE | SWP_NOZORDER)
#define SWP_AGG_STATUSFLAGS \
    (SWP_AGG_NOPOSCHANGE | SWP_FRAMECHANGED | SWP_HIDEWINDOW | SWP_SHOWWINDOW)
#define SWP_AGG_NOCLIENTCHANGE \
        (SWP_NOCLIENTSIZE | SWP_NOCLIENTMOVE)

/***********************************************************************
 *           alloc_user_handle
 */
HANDLE alloc_user_handle( struct user_object *ptr, unsigned int type )
{
    HANDLE handle = 0;

    SERVER_START_REQ( alloc_user_handle )
    {
        if (!wine_server_call_err( req )) handle = wine_server_ptr_handle( reply->handle );
    }
    SERVER_END_REQ;

    if (handle)
    {
        UINT index = USER_HANDLE_TO_INDEX( handle );

        assert( index < NB_USER_HANDLES );
        ptr->handle = handle;
        ptr->type = type;
        InterlockedExchangePointer( &user_handles[index], ptr );
    }
    return handle;
}

/***********************************************************************
 *           get_user_handle_ptr
 */
void *get_user_handle_ptr( HANDLE handle, unsigned int type )
{
    struct user_object *ptr;
    WORD index = USER_HANDLE_TO_INDEX( handle );

    if (index >= NB_USER_HANDLES) return NULL;

    user_lock();
    if ((ptr = user_handles[index]))
    {
        if (ptr->type == type &&
            ((UINT)(UINT_PTR)ptr->handle == (UINT)(UINT_PTR)handle ||
             !HIWORD(handle) || HIWORD(handle) == 0xffff))
            return ptr;
        ptr = NULL;
    }
    else ptr = OBJ_OTHER_PROCESS;
    user_unlock();
    return ptr;
}

/***********************************************************************
 *           set_user_handle_ptr
 */
void set_user_handle_ptr( HANDLE handle, struct user_object *ptr )
{
    WORD index = USER_HANDLE_TO_INDEX(handle);
    assert( index < NB_USER_HANDLES );
    InterlockedExchangePointer( &user_handles[index], ptr );
}

/***********************************************************************
 *           release_user_handle_ptr
 */
void release_user_handle_ptr( void *ptr )
{
    assert( ptr && ptr != OBJ_OTHER_PROCESS );
    user_unlock();
}

/***********************************************************************
 *           free_user_handle
 */
void *free_user_handle( HANDLE handle, unsigned int type )
{
    struct user_object *ptr;
    WORD index = USER_HANDLE_TO_INDEX( handle );

    if ((ptr = get_user_handle_ptr( handle, type )) && ptr != OBJ_OTHER_PROCESS)
    {
        SERVER_START_REQ( free_user_handle )
        {
            req->handle = wine_server_user_handle( handle );
            if (wine_server_call( req )) ptr = NULL;
            else InterlockedCompareExchangePointer( &user_handles[index], NULL, ptr );
        }
        SERVER_END_REQ;
        user_unlock();
    }
    return ptr;
}

/***********************************************************************
 *           next_thread_window
 */
WND *next_thread_window_ptr( HWND *hwnd )
{
    struct user_object *ptr;
    WND *win;
    WORD index = *hwnd ? USER_HANDLE_TO_INDEX( *hwnd ) + 1 : 0;

    while (index < NB_USER_HANDLES)
    {
        if (!(ptr = user_handles[index++])) continue;
        if (ptr->type != NTUSER_OBJ_WINDOW) continue;
        win = (WND *)ptr;
        if (win->tid != GetCurrentThreadId()) continue;
        *hwnd = ptr->handle;
        return win;
    }
    return NULL;
}

/*******************************************************************
 *           get_hwnd_message_parent
 *
 * Return the parent for HWND_MESSAGE windows.
 */
HWND get_hwnd_message_parent(void)
{
    struct user_thread_info *thread_info = get_user_thread_info();

    if (!thread_info->msg_window) get_desktop_window(); /* trigger creation */
    return thread_info->msg_window;
}

/***********************************************************************
 *           get_full_window_handle
 *
 * Convert a possibly truncated window handle to a full 32-bit handle.
 */
HWND get_full_window_handle( HWND hwnd )
{
    WND *win;

    if (!hwnd || (ULONG_PTR)hwnd >> 16) return hwnd;
    if (LOWORD(hwnd) <= 1 || LOWORD(hwnd) == 0xffff) return hwnd;
    /* do sign extension for -2 and -3 */
    if (LOWORD(hwnd) >= (WORD)-3) return (HWND)(LONG_PTR)(INT16)LOWORD(hwnd);

    if (!(win = get_win_ptr( hwnd ))) return hwnd;

    if (win == WND_DESKTOP)
    {
        if (LOWORD(hwnd) == LOWORD(get_desktop_window())) return get_desktop_window();
        else return get_hwnd_message_parent();
    }

    if (win != WND_OTHER_PROCESS)
    {
        hwnd = win->obj.handle;
        release_win_ptr( win );
    }
    else  /* may belong to another process */
    {
        SERVER_START_REQ( get_window_info )
        {
            req->handle = wine_server_user_handle( hwnd );
            if (!wine_server_call_err( req )) hwnd = wine_server_ptr_handle( reply->full_handle );
        }
        SERVER_END_REQ;
    }
    return hwnd;
}

/*******************************************************************
 *           is_desktop_window
 *
 * Check if window is the desktop or the HWND_MESSAGE top parent.
 */
BOOL is_desktop_window( HWND hwnd )
{
    struct user_thread_info *thread_info = get_user_thread_info();

    if (!hwnd) return FALSE;
    if (hwnd == thread_info->top_window) return TRUE;
    if (hwnd == thread_info->msg_window) return TRUE;

    if (!HIWORD(hwnd) || HIWORD(hwnd) == 0xffff)
    {
        if (LOWORD(thread_info->top_window) == LOWORD(hwnd)) return TRUE;
        if (LOWORD(thread_info->msg_window) == LOWORD(hwnd)) return TRUE;
    }
    return FALSE;
}

/***********************************************************************
 *           win_get_ptr
 *
 * Return a pointer to the WND structure if local to the process,
 * or WND_OTHER_PROCESS if handle may be valid in other process.
 * If ret value is a valid pointer, it must be released with WIN_ReleasePtr.
 */
WND *get_win_ptr( HWND hwnd )
{
    WND *win;

    if ((win = get_user_handle_ptr( hwnd, NTUSER_OBJ_WINDOW )) == WND_OTHER_PROCESS)
    {
        if (is_desktop_window( hwnd )) win = WND_DESKTOP;
    }
    return win;
}

/***********************************************************************
 *           is_current_thread_window
 *
 * Check whether a given window belongs to the current process (and return the full handle).
 */
HWND is_current_thread_window( HWND hwnd )
{
    WND *win;
    HWND ret = 0;

    if (!(win = get_win_ptr( hwnd )) || win == WND_OTHER_PROCESS || win == WND_DESKTOP)
        return 0;
    if (win->tid == GetCurrentThreadId()) ret = win->obj.handle;
    release_win_ptr( win );
    return ret;
}

/***********************************************************************
 *           is_current_process_window
 *
 * Check whether a given window belongs to the current process (and return the full handle).
 */
HWND is_current_process_window( HWND hwnd )
{
    WND *ptr;
    HWND ret;

    if (!(ptr = get_win_ptr( hwnd )) || ptr == WND_OTHER_PROCESS || ptr == WND_DESKTOP) return 0;
    ret = ptr->obj.handle;
    release_win_ptr( ptr );
    return ret;
}

/* see IsWindow */
BOOL is_window( HWND hwnd )
{
    WND *win;
    BOOL ret;

    if (!(win = get_win_ptr( hwnd ))) return FALSE;
    if (win == WND_DESKTOP) return TRUE;

    if (win != WND_OTHER_PROCESS)
    {
        release_win_ptr( win );
        return TRUE;
    }

    /* check other processes */
    SERVER_START_REQ( get_window_info )
    {
        req->handle = wine_server_user_handle( hwnd );
        ret = !wine_server_call_err( req );
    }
    SERVER_END_REQ;
    return ret;
}

/* see GetWindowThreadProcessId */
DWORD get_window_thread( HWND hwnd, DWORD *process )
{
    WND *ptr;
    DWORD tid = 0;

    if (!(ptr = get_win_ptr( hwnd )))
    {
        SetLastError( ERROR_INVALID_WINDOW_HANDLE);
        return 0;
    }

    if (ptr != WND_OTHER_PROCESS && ptr != WND_DESKTOP)
    {
        /* got a valid window */
        tid = ptr->tid;
        if (process) *process = GetCurrentProcessId();
        release_win_ptr( ptr );
        return tid;
    }

    /* check other processes */
    SERVER_START_REQ( get_window_info )
    {
        req->handle = wine_server_user_handle( hwnd );
        if (!wine_server_call_err( req ))
        {
            tid = (DWORD)reply->tid;
            if (process) *process = (DWORD)reply->pid;
        }
    }
    SERVER_END_REQ;
    return tid;
}

/* see GetParent */
static HWND get_parent( HWND hwnd )
{
    HWND retval = 0;
    WND *win;

    if (!(win = get_win_ptr( hwnd )))
    {
        SetLastError( ERROR_INVALID_WINDOW_HANDLE );
        return 0;
    }
    if (win == WND_DESKTOP) return 0;
    if (win == WND_OTHER_PROCESS)
    {
        LONG style = get_window_long( hwnd, GWL_STYLE );
        if (style & (WS_POPUP | WS_CHILD))
        {
            SERVER_START_REQ( get_window_tree )
            {
                req->handle = wine_server_user_handle( hwnd );
                if (!wine_server_call_err( req ))
                {
                    if (style & WS_POPUP) retval = wine_server_ptr_handle( reply->owner );
                    else if (style & WS_CHILD) retval = wine_server_ptr_handle( reply->parent );
                }
            }
            SERVER_END_REQ;
        }
    }
    else
    {
        if (win->dwStyle & WS_POPUP) retval = win->owner;
        else if (win->dwStyle & WS_CHILD) retval = win->parent;
        release_win_ptr( win );
    }
    return retval;
}

/*****************************************************************
 *           NtUserSetParent (win32u.@)
 */
HWND WINAPI NtUserSetParent( HWND hwnd, HWND parent )
{
    RECT window_rect, old_screen_rect, new_screen_rect;
    DPI_AWARENESS_CONTEXT context;
    WINDOWPOS winpos;
    HWND full_handle;
    HWND old_parent = 0;
    BOOL was_visible;
    WND *win;
    BOOL ret;

    TRACE("(%p %p)\n", hwnd, parent);

    if (is_broadcast(hwnd) || is_broadcast(parent))
    {
        SetLastError(ERROR_INVALID_PARAMETER);
        return 0;
    }

    if (!parent) parent = get_desktop_window();
    else if (parent == HWND_MESSAGE) parent = get_hwnd_message_parent();
    else parent = get_full_window_handle( parent );

    if (!is_window( parent ))
    {
        SetLastError( ERROR_INVALID_WINDOW_HANDLE );
        return 0;
    }

    /* Some applications try to set a child as a parent */
    if (is_child( hwnd, parent ))
    {
        SetLastError( ERROR_INVALID_PARAMETER );
        return 0;
    }

    if (!(full_handle = is_current_thread_window( hwnd )))
        return UlongToHandle( send_message( hwnd, WM_WINE_SETPARENT, (WPARAM)parent, 0 ));

    if (full_handle == parent)
    {
        SetLastError( ERROR_INVALID_PARAMETER );
        return 0;
    }

    /* Windows hides the window first, then shows it again
     * including the WM_SHOWWINDOW messages and all */
    was_visible = NtUserShowWindow( hwnd, SW_HIDE );

    win = get_win_ptr( hwnd );
    if (!win || win == WND_OTHER_PROCESS || win == WND_DESKTOP) return 0;

    get_window_rects( hwnd, COORDS_PARENT, &window_rect, NULL, get_dpi_for_window(hwnd) );
    get_window_rects( hwnd, COORDS_SCREEN, &old_screen_rect, NULL, 0 );

    SERVER_START_REQ( set_parent )
    {
        req->handle = wine_server_user_handle( hwnd );
        req->parent = wine_server_user_handle( parent );
        if ((ret = !wine_server_call_err( req )))
        {
            old_parent = wine_server_ptr_handle( reply->old_parent );
            win->parent = parent = wine_server_ptr_handle( reply->full_parent );
            win->dpi = reply->dpi;
            win->dpi_awareness = reply->awareness;
        }

    }
    SERVER_END_REQ;
    release_win_ptr( win );
    if (!ret) return 0;

    get_window_rects( hwnd, COORDS_SCREEN, &new_screen_rect, NULL, 0 );
    context = set_thread_dpi_awareness_context( get_window_dpi_awareness_context( hwnd ));

    user_driver->pSetParent( full_handle, parent, old_parent );

    winpos.hwnd = hwnd;
    winpos.hwndInsertAfter = HWND_TOP;
    winpos.x = window_rect.left;
    winpos.y = window_rect.top;
    winpos.cx = 0;
    winpos.cy = 0;
    winpos.flags = SWP_NOSIZE;

    set_window_pos( &winpos, new_screen_rect.left - old_screen_rect.left,
                    new_screen_rect.top - old_screen_rect.top );

    if (was_visible) NtUserShowWindow( hwnd, SW_SHOW );

    set_thread_dpi_awareness_context( context );
    return old_parent;
}

/* see GetWindow */
static HWND get_window_relative( HWND hwnd, UINT rel )
{
    HWND retval = 0;

    if (rel == GW_OWNER)  /* this one may be available locally */
    {
        WND *win = get_win_ptr( hwnd );
        if (!win)
        {
            SetLastError( ERROR_INVALID_HANDLE );
            return 0;
        }
        if (win == WND_DESKTOP) return 0;
        if (win != WND_OTHER_PROCESS)
        {
            retval = win->owner;
            release_win_ptr( win );
            return retval;
        }
        /* else fall through to server call */
    }

    SERVER_START_REQ( get_window_tree )
    {
        req->handle = wine_server_user_handle( hwnd );
        if (!wine_server_call_err( req ))
        {
            switch(rel)
            {
            case GW_HWNDFIRST:
                retval = wine_server_ptr_handle( reply->first_sibling );
                break;
            case GW_HWNDLAST:
                retval = wine_server_ptr_handle( reply->last_sibling );
                break;
            case GW_HWNDNEXT:
                retval = wine_server_ptr_handle( reply->next_sibling );
                break;
            case GW_HWNDPREV:
                retval = wine_server_ptr_handle( reply->prev_sibling );
                break;
            case GW_OWNER:
                retval = wine_server_ptr_handle( reply->owner );
                break;
            case GW_CHILD:
                retval = wine_server_ptr_handle( reply->first_child );
                break;
            }
        }
    }
    SERVER_END_REQ;
    return retval;
}

/*******************************************************************
 *           list_window_parents
 *
 * Build an array of all parents of a given window, starting with
 * the immediate parent. The array must be freed with free().
 */
static HWND *list_window_parents( HWND hwnd )
{
    WND *win;
    HWND current, *list;
    int i, pos = 0, size = 16, count;

    if (!(list = malloc( size * sizeof(HWND) ))) return NULL;

    current = hwnd;
    for (;;)
    {
        if (!(win = get_win_ptr( current ))) goto empty;
        if (win == WND_OTHER_PROCESS) break;  /* need to do it the hard way */
        if (win == WND_DESKTOP)
        {
            if (!pos) goto empty;
            list[pos] = 0;
            return list;
        }
        list[pos] = current = win->parent;
        release_win_ptr( win );
        if (!current) return list;
        if (++pos == size - 1)
        {
            /* need to grow the list */
            HWND *new_list = realloc( list, (size + 16) * sizeof(HWND) );
            if (!new_list) goto empty;
            list = new_list;
            size += 16;
        }
    }

    /* at least one parent belongs to another process, have to query the server */

    for (;;)
    {
        count = 0;
        SERVER_START_REQ( get_window_parents )
        {
            req->handle = wine_server_user_handle( hwnd );
            wine_server_set_reply( req, list, (size-1) * sizeof(user_handle_t) );
            if (!wine_server_call( req )) count = reply->count;
        }
        SERVER_END_REQ;
        if (!count) goto empty;
        if (size > count)
        {
            /* start from the end since HWND is potentially larger than user_handle_t */
            for (i = count - 1; i >= 0; i--)
                list[i] = wine_server_ptr_handle( ((user_handle_t *)list)[i] );
            list[count] = 0;
            return list;
        }
        free( list );
        size = count + 1;
        if (!(list = malloc( size * sizeof(HWND) ))) return NULL;
    }

empty:
    free( list );
    return NULL;
}

/*******************************************************************
 *           list_window_children
 *
 * Build an array of the children of a given window. The array must be
 * freed with HeapFree. Returns NULL when no windows are found.
 */
HWND *list_window_children( HDESK desktop, HWND hwnd, UNICODE_STRING *class, DWORD tid )
{
    HWND *list;
    int i, size = 128;
    ATOM atom = class ? get_int_atom_value( class ) : 0;

    /* empty class is not the same as NULL class */
    if (!atom && class && !class->Length) return NULL;

    for (;;)
    {
        int count = 0;

        if (!(list = malloc( size * sizeof(HWND) ))) break;

        SERVER_START_REQ( get_window_children )
        {
            req->desktop = wine_server_obj_handle( desktop );
            req->parent = wine_server_user_handle( hwnd );
            req->tid = tid;
            req->atom = atom;
            if (!atom && class) wine_server_add_data( req, class->Buffer, class->Length );
            wine_server_set_reply( req, list, (size-1) * sizeof(user_handle_t) );
            if (!wine_server_call( req )) count = reply->count;
        }
        SERVER_END_REQ;
        if (count && count < size)
        {
            /* start from the end since HWND is potentially larger than user_handle_t */
            for (i = count - 1; i >= 0; i--)
                list[i] = wine_server_ptr_handle( ((user_handle_t *)list)[i] );
            list[count] = 0;
            return list;
        }
        free( list );
        if (!count) break;
        size = count + 1;  /* restart with a large enough buffer */
    }
    return NULL;
}

/*****************************************************************
 *           NtUserGetAncestor (win32u.@)
 */
HWND WINAPI NtUserGetAncestor( HWND hwnd, UINT type )
{
    HWND *list, ret = 0;
    WND *win;

    switch(type)
    {
    case GA_PARENT:
        if (!(win = get_win_ptr( hwnd )))
        {
            SetLastError( ERROR_INVALID_WINDOW_HANDLE );
            return 0;
        }
        if (win == WND_DESKTOP) return 0;
        if (win != WND_OTHER_PROCESS)
        {
            ret = win->parent;
            release_win_ptr( win );
        }
        else /* need to query the server */
        {
            SERVER_START_REQ( get_window_tree )
            {
                req->handle = wine_server_user_handle( hwnd );
                if (!wine_server_call_err( req )) ret = wine_server_ptr_handle( reply->parent );
            }
            SERVER_END_REQ;
        }
        break;

    case GA_ROOT:
        if (!(list = list_window_parents( hwnd ))) return 0;

        if (!list[0] || !list[1]) ret = get_full_window_handle( hwnd );  /* top-level window */
        else
        {
            int count = 2;
            while (list[count]) count++;
            ret = list[count - 2];  /* get the one before the desktop */
        }
        free( list );
        break;

    case GA_ROOTOWNER:
        if (is_desktop_window( hwnd )) return 0;
        ret = get_full_window_handle( hwnd );
        for (;;)
        {
            HWND parent = get_parent( ret );
            if (!parent) break;
            ret = parent;
        }
        break;
    }
    return ret;
}

/* see IsChild */
BOOL is_child( HWND parent, HWND child )
{
    HWND *list;
    int i;
    BOOL ret = FALSE;

    if (!(get_window_long( child, GWL_STYLE ) & WS_CHILD)) return FALSE;
    if (!(list = list_window_parents( child ))) return FALSE;
    parent = get_full_window_handle( parent );
    for (i = 0; list[i]; i++)
    {
        if (list[i] == parent)
        {
            ret = list[i] && list[i+1];
            break;
        }
        if (!(get_window_long( list[i], GWL_STYLE ) & WS_CHILD)) break;
    }
    free( list );
    return ret;
}

/* see IsWindowVisible */
static BOOL is_window_visible( HWND hwnd )
{
    HWND *list;
    BOOL retval = TRUE;
    int i;

    if (!(get_window_long( hwnd, GWL_STYLE ) & WS_VISIBLE)) return FALSE;
    if (!(list = list_window_parents( hwnd ))) return TRUE;
    if (list[0])
    {
        for (i = 0; list[i+1]; i++)
            if (!(get_window_long( list[i], GWL_STYLE ) & WS_VISIBLE)) break;
        retval = !list[i+1] && (list[i] == get_desktop_window());  /* top message window isn't visible */
    }
    free( list );
    return retval;
}

/***********************************************************************
 *           is_window_drawable
 *
 * hwnd is drawable when it is visible, all parents are not
 * minimized, and it is itself not minimized unless we are
 * trying to draw its default class icon.
 */
static BOOL is_window_drawable( HWND hwnd, BOOL icon )
{
    HWND *list;
    BOOL retval = TRUE;
    int i;
    LONG style = get_window_long( hwnd, GWL_STYLE );

    if (!(style & WS_VISIBLE)) return FALSE;
    if ((style & WS_MINIMIZE) && icon && get_class_long_ptr( hwnd, GCLP_HICON, FALSE ))  return FALSE;

    if (!(list = list_window_parents( hwnd ))) return TRUE;
    if (list[0])
    {
        for (i = 0; list[i+1]; i++)
            if ((get_window_long( list[i], GWL_STYLE ) & (WS_VISIBLE|WS_MINIMIZE)) != WS_VISIBLE)
                break;
        retval = !list[i+1] && (list[i] == get_desktop_window());  /* top message window isn't visible */
    }
    free( list );
    return retval;
}

/* see IsWindowUnicode */
static BOOL is_window_unicode( HWND hwnd )
{
    WND *win;
    BOOL ret = FALSE;

    if (!(win = get_win_ptr(hwnd))) return FALSE;

    if (win == WND_DESKTOP) return TRUE;

    if (win != WND_OTHER_PROCESS)
    {
        ret = (win->flags & WIN_ISUNICODE) != 0;
        release_win_ptr( win );
    }
    else
    {
        SERVER_START_REQ( get_window_info )
        {
            req->handle = wine_server_user_handle( hwnd );
            if (!wine_server_call_err( req )) ret = reply->is_unicode;
        }
        SERVER_END_REQ;
    }
    return ret;
}

/* see GetWindowDpiAwarenessContext */
DPI_AWARENESS_CONTEXT get_window_dpi_awareness_context( HWND hwnd )
{
    DPI_AWARENESS_CONTEXT ret = 0;
    WND *win;

    if (!(win = get_win_ptr( hwnd )))
    {
        SetLastError( ERROR_INVALID_WINDOW_HANDLE );
        return 0;
    }
    if (win == WND_DESKTOP) return DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE;
    if (win != WND_OTHER_PROCESS)
    {
        ret = ULongToHandle( win->dpi_awareness | 0x10 );
        release_win_ptr( win );
    }
    else
    {
        SERVER_START_REQ( get_window_info )
        {
            req->handle = wine_server_user_handle( hwnd );
            if (!wine_server_call_err( req )) ret = ULongToHandle( reply->awareness | 0x10 );
        }
        SERVER_END_REQ;
    }
    return ret;
}

/* see GetDpiForWindow */
UINT get_dpi_for_window( HWND hwnd )
{
    WND *win;
    UINT ret = 0;

    if (!(win = get_win_ptr( hwnd )))
    {
        SetLastError( ERROR_INVALID_WINDOW_HANDLE );
        return 0;
    }
    if (win == WND_DESKTOP)
    {
        POINT pt = { 0, 0 };
        return get_monitor_dpi( monitor_from_point( pt, MONITOR_DEFAULTTOPRIMARY, 0 ));
    }
    if (win != WND_OTHER_PROCESS)
    {
        ret = win->dpi;
        if (!ret) ret = get_win_monitor_dpi( hwnd );
        release_win_ptr( win );
    }
    else
    {
        SERVER_START_REQ( get_window_info )
        {
            req->handle = wine_server_user_handle( hwnd );
            if (!wine_server_call_err( req )) ret = reply->dpi;
        }
        SERVER_END_REQ;
    }
    return ret;
}

static LONG_PTR get_win_data( const void *ptr, UINT size )
{
    if (size == sizeof(WORD))
    {
        WORD ret;
        memcpy( &ret, ptr, sizeof(ret) );
        return ret;
    }
    else if (size == sizeof(DWORD))
    {
        DWORD ret;
        memcpy( &ret, ptr, sizeof(ret) );
        return ret;
    }
    else
    {
        LONG_PTR ret;
        memcpy( &ret, ptr, sizeof(ret) );
        return ret;
    }
}

/* helper for set_window_long */
static inline void set_win_data( void *ptr, LONG_PTR val, UINT size )
{
    if (size == sizeof(WORD))
    {
        WORD newval = val;
        memcpy( ptr, &newval, sizeof(newval) );
    }
    else if (size == sizeof(DWORD))
    {
        DWORD newval = val;
        memcpy( ptr, &newval, sizeof(newval) );
    }
    else
    {
        memcpy( ptr, &val, sizeof(val) );
    }
}

BOOL is_iconic( HWND hwnd )
{
    return (get_window_long( hwnd, GWL_STYLE ) & WS_MINIMIZE) != 0;
}

static LONG_PTR get_window_long_size( HWND hwnd, INT offset, UINT size, BOOL ansi )
{
    LONG_PTR retval = 0;
    WND *win;

    if (offset == GWLP_HWNDPARENT)
    {
        HWND parent = NtUserGetAncestor( hwnd, GA_PARENT );
        if (parent == get_desktop_window())
            parent = get_window_relative( hwnd, GW_OWNER );
        return (ULONG_PTR)parent;
    }

    if (!(win = get_win_ptr( hwnd )))
    {
        SetLastError( ERROR_INVALID_WINDOW_HANDLE );
        return 0;
    }

    if (win == WND_DESKTOP)
    {
        switch (offset)
        {
        case GWL_STYLE:
            retval = WS_POPUP | WS_CLIPSIBLINGS | WS_CLIPCHILDREN; /* message parent is not visible */
            if (get_full_window_handle( hwnd ) == get_desktop_window())
                retval |= WS_VISIBLE;
            return retval;
        case GWL_EXSTYLE:
        case GWLP_USERDATA:
        case GWLP_ID:
        case GWLP_HINSTANCE:
            return 0;
        case GWLP_WNDPROC:
            SetLastError( ERROR_ACCESS_DENIED );
            return 0;
        }
        SetLastError( ERROR_INVALID_INDEX );
        return 0;
    }

    if (win == WND_OTHER_PROCESS)
    {
        if (offset == GWLP_WNDPROC)
        {
            SetLastError( ERROR_ACCESS_DENIED );
            return 0;
        }
        SERVER_START_REQ( set_window_info )
        {
            req->handle = wine_server_user_handle( hwnd );
            req->flags  = 0;  /* don't set anything, just retrieve */
            req->extra_offset = (offset >= 0) ? offset : -1;
            req->extra_size = (offset >= 0) ? size : 0;
            if (!wine_server_call_err( req ))
            {
                switch(offset)
                {
                case GWL_STYLE:      retval = reply->old_style; break;
                case GWL_EXSTYLE:    retval = reply->old_ex_style; break;
                case GWLP_ID:        retval = reply->old_id; break;
                case GWLP_HINSTANCE: retval = (ULONG_PTR)wine_server_get_ptr( reply->old_instance ); break;
                case GWLP_USERDATA:  retval = reply->old_user_data; break;
                default:
                    if (offset >= 0) retval = get_win_data( &reply->old_extra_value, size );
                    else SetLastError( ERROR_INVALID_INDEX );
                    break;
                }
            }
        }
        SERVER_END_REQ;
        return retval;
    }

    /* now we have a valid win */

    if (offset >= 0)
    {
        if (offset > (int)(win->cbWndExtra - size))
        {
            WARN("Invalid offset %d\n", offset );
            release_win_ptr( win );
            SetLastError( ERROR_INVALID_INDEX );
            return 0;
        }
        retval = get_win_data( (char *)win->wExtra + offset, size );

        /* Special case for dialog window procedure */
        if ((offset == DWLP_DLGPROC) && (size == sizeof(LONG_PTR)) && win->dlgInfo)
            retval = (LONG_PTR)get_winproc( (WNDPROC)retval, ansi );
        release_win_ptr( win );
        return retval;
    }

    switch(offset)
    {
    case GWLP_USERDATA:  retval = win->userdata; break;
    case GWL_STYLE:      retval = win->dwStyle; break;
    case GWL_EXSTYLE:    retval = win->dwExStyle; break;
    case GWLP_ID:        retval = win->wIDmenu; break;
    case GWLP_HINSTANCE: retval = (ULONG_PTR)win->hInstance; break;
    case GWLP_WNDPROC:
        /* This looks like a hack only for the edit control (see tests). This makes these controls
         * more tolerant to A/W mismatches. The lack of W->A->W conversion for such a mismatch suggests
         * that the hack is in GetWindowLongPtr[AW], not in winprocs.
         */
        if (win->winproc == BUILTIN_WINPROC(WINPROC_EDIT) && (!!ansi != !(win->flags & WIN_ISUNICODE)))
            retval = (ULONG_PTR)win->winproc;
        else
            retval = (ULONG_PTR)get_winproc( win->winproc, ansi );
        break;
    default:
        WARN("Unknown offset %d\n", offset );
        SetLastError( ERROR_INVALID_INDEX );
        break;
    }
    release_win_ptr( win );
    return retval;
}

/* see GetWindowLongW */
DWORD get_window_long( HWND hwnd, INT offset )
{
    return get_window_long_size( hwnd, offset, sizeof(LONG), FALSE );
}

/* see GetWindowLongPtr */
static ULONG_PTR get_window_long_ptr( HWND hwnd, INT offset, BOOL ansi )
{
    return get_window_long_size( hwnd, offset, sizeof(LONG_PTR), ansi );
}

/* see GetWindowWord */
static WORD get_window_word( HWND hwnd, INT offset )
{
    switch(offset)
    {
    case GWLP_ID:
    case GWLP_HINSTANCE:
    case GWLP_HWNDPARENT:
        break;
    default:
        if (offset < 0)
        {
            WARN("Invalid offset %d\n", offset );
            SetLastError( ERROR_INVALID_INDEX );
            return 0;
        }
        break;
    }
    return get_window_long_size( hwnd, offset, sizeof(WORD), TRUE );
}

/***********************************************************************
 *           set_window_style
 *
 * Change the style of a window.
 */
ULONG set_window_style( HWND hwnd, ULONG set_bits, ULONG clear_bits )
{
    BOOL ok, made_visible = FALSE;
    STYLESTRUCT style;
    WND *win = get_win_ptr( hwnd );

    if (!win || win == WND_DESKTOP) return 0;
    if (win == WND_OTHER_PROCESS)
    {
        if (is_window(hwnd))
            return send_message( hwnd, WM_WINE_SETSTYLE, set_bits, clear_bits );
        return 0;
    }
    style.styleOld = win->dwStyle;
    style.styleNew = (win->dwStyle | set_bits) & ~clear_bits;
    if (style.styleNew == style.styleOld)
    {
        release_win_ptr( win );
        return style.styleNew;
    }
    SERVER_START_REQ( set_window_info )
    {
        req->handle = wine_server_user_handle( hwnd );
        req->flags  = SET_WIN_STYLE;
        req->style  = style.styleNew;
        req->extra_offset = -1;
        if ((ok = !wine_server_call( req )))
        {
            style.styleOld = reply->old_style;
            win->dwStyle = style.styleNew;
        }
    }
    SERVER_END_REQ;

    if (ok && ((style.styleOld ^ style.styleNew) & WS_VISIBLE))
    {
        made_visible = (style.styleNew & WS_VISIBLE) != 0;
        invalidate_dce( win, NULL );
    }
    release_win_ptr( win );

    if (!ok) return 0;

    user_driver->pSetWindowStyle( hwnd, GWL_STYLE, &style );
    if (made_visible) update_window_state( hwnd );

    return style.styleOld;
}

static DWORD fix_exstyle( DWORD style, DWORD exstyle )
{
    if ((exstyle & WS_EX_DLGMODALFRAME) ||
        (!(exstyle & WS_EX_STATICEDGE) && (style & (WS_DLGFRAME | WS_THICKFRAME))))
        exstyle |= WS_EX_WINDOWEDGE;
    else
        exstyle &= ~WS_EX_WINDOWEDGE;
    return exstyle;
}

/* Change the owner of a window. */
static HWND set_window_owner( HWND hwnd, HWND owner )
{
    WND *win = get_win_ptr( hwnd );
    HWND ret = 0;

    if (!win || win == WND_DESKTOP) return 0;
    if (win == WND_OTHER_PROCESS)
    {
        if (is_window(hwnd)) ERR( "cannot set owner %p on other process window %p\n", owner, hwnd );
        return 0;
    }
    SERVER_START_REQ( set_window_owner )
    {
        req->handle = wine_server_user_handle( hwnd );
        req->owner  = wine_server_user_handle( owner );
        if (!wine_server_call( req ))
        {
            win->owner = wine_server_ptr_handle( reply->full_owner );
            ret = wine_server_ptr_handle( reply->prev_owner );
        }
    }
    SERVER_END_REQ;
    release_win_ptr( win );
    return ret;
}

/* Helper function for SetWindowLong(). */
LONG_PTR set_window_long( HWND hwnd, INT offset, UINT size, LONG_PTR newval, BOOL ansi )
{
    BOOL ok, made_visible = FALSE;
    LONG_PTR retval = 0;
    STYLESTRUCT style;
    WND *win;

    TRACE( "%p %d %lx %c\n", hwnd, offset, newval, ansi ? 'A' : 'W' );

    if (is_broadcast(hwnd))
    {
        SetLastError( ERROR_INVALID_PARAMETER );
        return FALSE;
    }

    if (!(win = get_win_ptr( hwnd )))
    {
        SetLastError( ERROR_INVALID_WINDOW_HANDLE );
        return 0;
    }
    if (win == WND_DESKTOP)
    {
        /* can't change anything on the desktop window */
        SetLastError( ERROR_ACCESS_DENIED );
        return 0;
    }
    if (win == WND_OTHER_PROCESS)
    {
        if (offset == GWLP_WNDPROC)
        {
            SetLastError( ERROR_ACCESS_DENIED );
            return 0;
        }
        if (offset > 32767 || offset < -32767)
        {
            SetLastError( ERROR_INVALID_INDEX );
            return 0;
        }
        return send_message( hwnd, WM_WINE_SETWINDOWLONG, MAKEWPARAM( offset, size ), newval );
    }

    /* first some special cases */
    switch( offset )
    {
    case GWL_STYLE:
        style.styleOld = win->dwStyle;
        style.styleNew = newval;
        release_win_ptr( win );
        send_message( hwnd, WM_STYLECHANGING, GWL_STYLE, (LPARAM)&style );
        if (!(win = get_win_ptr( hwnd )) || win == WND_OTHER_PROCESS) return 0;
        newval = style.styleNew;
        /* WS_CLIPSIBLINGS can't be reset on top-level windows */
        if (win->parent == get_desktop_window()) newval |= WS_CLIPSIBLINGS;
        /* WS_MINIMIZE can't be reset */
        if (win->dwStyle & WS_MINIMIZE) newval |= WS_MINIMIZE;
        break;
    case GWL_EXSTYLE:
        style.styleOld = win->dwExStyle;
        style.styleNew = newval;
        release_win_ptr( win );
        send_message( hwnd, WM_STYLECHANGING, GWL_EXSTYLE, (LPARAM)&style );
        if (!(win = get_win_ptr( hwnd )) || win == WND_OTHER_PROCESS) return 0;
        /* WS_EX_TOPMOST can only be changed through SetWindowPos */
        newval = (style.styleNew & ~WS_EX_TOPMOST) | (win->dwExStyle & WS_EX_TOPMOST);
        newval = fix_exstyle(win->dwStyle, newval);
        break;
    case GWLP_HWNDPARENT:
        if (win->parent == get_desktop_window())
        {
            release_win_ptr( win );
            return (ULONG_PTR)set_window_owner( hwnd, (HWND)newval );
        }
        else
        {
            release_win_ptr( win );
            return (ULONG_PTR)NtUserSetParent( hwnd, (HWND)newval );
        }
    case GWLP_WNDPROC:
    {
        WNDPROC proc;
        UINT old_flags = win->flags;
        retval = get_window_long_ptr( hwnd, offset, ansi );
        proc = alloc_winproc( (WNDPROC)newval, ansi );
        if (proc) win->winproc = proc;
        if (is_winproc_unicode( proc, !ansi )) win->flags |= WIN_ISUNICODE;
        else win->flags &= ~WIN_ISUNICODE;
        if (!((old_flags ^ win->flags) & WIN_ISUNICODE))
        {
            release_win_ptr( win );
            return retval;
        }
        /* update is_unicode flag on the server side */
        break;
    }
    case GWLP_ID:
    case GWLP_HINSTANCE:
    case GWLP_USERDATA:
        break;
    case DWLP_DLGPROC:
        if ((win->cbWndExtra - sizeof(LONG_PTR) >= DWLP_DLGPROC) &&
            (size == sizeof(LONG_PTR)) && win->dlgInfo)
        {
            WNDPROC *ptr = (WNDPROC *)((char *)win->wExtra + DWLP_DLGPROC);
            retval = (ULONG_PTR)get_winproc( *ptr, ansi );
            *ptr = alloc_winproc( (WNDPROC)newval, ansi );
            release_win_ptr( win );
            return retval;
        }
        /* fall through */
    default:
        if (offset < 0 || offset > (int)(win->cbWndExtra - size))
        {
            WARN("Invalid offset %d\n", offset );
            release_win_ptr( win );
            SetLastError( ERROR_INVALID_INDEX );
            return 0;
        }
        else if (get_win_data( (char *)win->wExtra + offset, size ) == newval)
        {
            /* already set to the same value */
            release_win_ptr( win );
            return newval;
        }
        break;
    }

    SERVER_START_REQ( set_window_info )
    {
        req->handle = wine_server_user_handle( hwnd );
        req->extra_offset = -1;
        switch(offset)
        {
        case GWL_STYLE:
            req->flags = SET_WIN_STYLE | SET_WIN_EXSTYLE;
            req->style = newval;
            req->ex_style = fix_exstyle(newval, win->dwExStyle);
            break;
        case GWL_EXSTYLE:
            req->flags = SET_WIN_EXSTYLE;
            req->ex_style = newval;
            break;
        case GWLP_ID:
            req->flags = SET_WIN_ID;
            req->extra_value = newval;
            break;
        case GWLP_HINSTANCE:
            req->flags = SET_WIN_INSTANCE;
            req->instance = wine_server_client_ptr( (void *)newval );
            break;
        case GWLP_WNDPROC:
            req->flags = SET_WIN_UNICODE;
            req->is_unicode = (win->flags & WIN_ISUNICODE) != 0;
            break;
        case GWLP_USERDATA:
            req->flags = SET_WIN_USERDATA;
            req->user_data = newval;
            break;
        default:
            req->flags = SET_WIN_EXTRA;
            req->extra_offset = offset;
            req->extra_size = size;
            set_win_data( &req->extra_value, newval, size );
        }
        if ((ok = !wine_server_call_err( req )))
        {
            switch(offset)
            {
            case GWL_STYLE:
                win->dwStyle = newval;
                win->dwExStyle = fix_exstyle(win->dwStyle, win->dwExStyle);
                retval = reply->old_style;
                break;
            case GWL_EXSTYLE:
                win->dwExStyle = newval;
                retval = reply->old_ex_style;
                break;
            case GWLP_ID:
                win->wIDmenu = newval;
                retval = reply->old_id;
                break;
            case GWLP_HINSTANCE:
                win->hInstance = (HINSTANCE)newval;
                retval = (ULONG_PTR)wine_server_get_ptr( reply->old_instance );
                break;
            case GWLP_WNDPROC:
                break;
            case GWLP_USERDATA:
                win->userdata = newval;
                retval = reply->old_user_data;
                break;
            default:
                retval = get_win_data( (char *)win->wExtra + offset, size );
                set_win_data( (char *)win->wExtra + offset, newval, size );
                break;
            }
        }
    }
    SERVER_END_REQ;

    if ((offset == GWL_STYLE && ((style.styleOld ^ style.styleNew) & WS_VISIBLE)) ||
        (offset == GWL_EXSTYLE && ((style.styleOld ^ style.styleNew) & WS_EX_LAYERED)))
    {
        made_visible = (win->dwStyle & WS_VISIBLE) != 0;
        invalidate_dce( win, NULL );
    }
    release_win_ptr( win );

    if (!ok) return 0;

    if (offset == GWL_STYLE || offset == GWL_EXSTYLE)
    {
        style.styleOld = retval;
        style.styleNew = newval;
        user_driver->pSetWindowStyle( hwnd, offset, &style );
        if (made_visible) update_window_state( hwnd );
        send_message( hwnd, WM_STYLECHANGED, offset, (LPARAM)&style );
    }

    return retval;
}

/**********************************************************************
 *           NtUserSetWindowWord (win32u.@)
 */
WORD WINAPI NtUserSetWindowWord( HWND hwnd, INT offset, WORD newval )
{
    switch(offset)
    {
    case GWLP_ID:
    case GWLP_HINSTANCE:
    case GWLP_HWNDPARENT:
        break;
    default:
        if (offset < 0)
        {
            WARN("Invalid offset %d\n", offset );
            SetLastError( ERROR_INVALID_INDEX );
            return 0;
        }
        break;
    }
    return set_window_long( hwnd, offset, sizeof(WORD), newval, TRUE );
}

/**********************************************************************
 *           NtUserSetWindowLong (win32u.@)
 */
LONG WINAPI NtUserSetWindowLong( HWND hwnd, INT offset, LONG newval, BOOL ansi )
{
    return set_window_long( hwnd, offset, sizeof(LONG), newval, ansi );
}

/*****************************************************************************
 *           NtUserSetWindowLongPtr (win32u.@)
 */
LONG_PTR WINAPI NtUserSetWindowLongPtr( HWND hwnd, INT offset, LONG_PTR newval, BOOL ansi )
{
    return set_window_long( hwnd, offset, sizeof(LONG_PTR), newval, ansi );
}

static BOOL set_window_pixel_format( HWND hwnd, int format )
{
    WND *win = get_win_ptr( hwnd );

    if (!win || win == WND_DESKTOP || win == WND_OTHER_PROCESS)
    {
        WARN( "setting format %d on win %p not supported\n", format, hwnd );
        return FALSE;
    }
    win->pixel_format = format;
    release_win_ptr( win );

    update_window_state( hwnd );
    return TRUE;
}

/***********************************************************************
 *           NtUserGetProp   (win32u.@)
 *
 * NOTE Native allows only ATOMs as the second argument. We allow strings
 *      to save extra server call in GetPropW.
 */
HANDLE WINAPI NtUserGetProp( HWND hwnd, const WCHAR *str )
{
    ULONG_PTR ret = 0;

    SERVER_START_REQ( get_window_property )
    {
        req->window = wine_server_user_handle( hwnd );
        if (IS_INTRESOURCE(str)) req->atom = LOWORD(str);
        else wine_server_add_data( req, str, lstrlenW(str) * sizeof(WCHAR) );
        if (!wine_server_call_err( req )) ret = reply->data;
    }
    SERVER_END_REQ;
    return (HANDLE)ret;
}

/*****************************************************************************
 *           NtUserSetProp    (win32u.@)
 *
 * NOTE Native allows only ATOMs as the second argument. We allow strings
 *      to save extra server call in SetPropW.
 */
BOOL WINAPI NtUserSetProp( HWND hwnd, const WCHAR *str, HANDLE handle )
{
    BOOL ret;

    SERVER_START_REQ( set_window_property )
    {
        req->window = wine_server_user_handle( hwnd );
        req->data   = (ULONG_PTR)handle;
        if (IS_INTRESOURCE(str)) req->atom = LOWORD(str);
        else wine_server_add_data( req, str, lstrlenW(str) * sizeof(WCHAR) );
        ret = !wine_server_call_err( req );
    }
    SERVER_END_REQ;
    return ret;
}


/***********************************************************************
 *           NtUserRemoveProp   (win32u.@)
 *
 * NOTE Native allows only ATOMs as the second argument. We allow strings
 *      to save extra server call in RemovePropW.
 */
HANDLE WINAPI NtUserRemoveProp( HWND hwnd, const WCHAR *str )
{
    ULONG_PTR ret = 0;

    SERVER_START_REQ( remove_window_property )
    {
        req->window = wine_server_user_handle( hwnd );
        if (IS_INTRESOURCE(str)) req->atom = LOWORD(str);
        else wine_server_add_data( req, str, lstrlenW(str) * sizeof(WCHAR) );
        if (!wine_server_call_err( req )) ret = reply->data;
    }
    SERVER_END_REQ;

    return (HANDLE)ret;
}

static void mirror_rect( const RECT *window_rect, RECT *rect )
{
    int width = window_rect->right - window_rect->left;
    int tmp = rect->left;
    rect->left = width - rect->right;
    rect->right = width - tmp;
}

/***********************************************************************
 *           get_window_rects
 *
 * Get the window and client rectangles.
 */
BOOL get_window_rects( HWND hwnd, enum coords_relative relative, RECT *window_rect,
                       RECT *client_rect, UINT dpi )
{
    WND *win = get_win_ptr( hwnd );
    BOOL ret = TRUE;

    if (!win)
    {
        SetLastError( ERROR_INVALID_WINDOW_HANDLE );
        return FALSE;
    }
    if (win == WND_DESKTOP)
    {
        RECT rect;
        rect.left = rect.top = 0;
        if (hwnd == get_hwnd_message_parent())
        {
            rect.right  = 100;
            rect.bottom = 100;
            rect = map_dpi_rect( rect, get_dpi_for_window( hwnd ), dpi );
        }
        else
        {
            rect = get_primary_monitor_rect( dpi );
        }
        if (window_rect) *window_rect = rect;
        if (client_rect) *client_rect = rect;
        return TRUE;
    }
    if (win != WND_OTHER_PROCESS)
    {
        UINT window_dpi = get_dpi_for_window( hwnd );
        RECT window = win->window_rect;
        RECT client = win->client_rect;

        switch (relative)
        {
        case COORDS_CLIENT:
            OffsetRect( &window, -win->client_rect.left, -win->client_rect.top );
            OffsetRect( &client, -win->client_rect.left, -win->client_rect.top );
            if (win->dwExStyle & WS_EX_LAYOUTRTL)
                mirror_rect( &win->client_rect, &window );
            break;
        case COORDS_WINDOW:
            OffsetRect( &window, -win->window_rect.left, -win->window_rect.top );
            OffsetRect( &client, -win->window_rect.left, -win->window_rect.top );
            if (win->dwExStyle & WS_EX_LAYOUTRTL)
                mirror_rect( &win->window_rect, &client );
            break;
        case COORDS_PARENT:
            if (win->parent)
            {
                WND *parent = get_win_ptr( win->parent );
                if (parent == WND_DESKTOP) break;
                if (!parent || parent == WND_OTHER_PROCESS)
                {
                    release_win_ptr( win );
                    goto other_process;
                }
                if (parent->flags & WIN_CHILDREN_MOVED)
                {
                    release_win_ptr( parent );
                    release_win_ptr( win );
                    goto other_process;
                }
                if (parent->dwExStyle & WS_EX_LAYOUTRTL)
                {
                    mirror_rect( &parent->client_rect, &window );
                    mirror_rect( &parent->client_rect, &client );
                }
                release_win_ptr( parent );
            }
            break;
        case COORDS_SCREEN:
            while (win->parent)
            {
                WND *parent = get_win_ptr( win->parent );
                if (parent == WND_DESKTOP) break;
                if (!parent || parent == WND_OTHER_PROCESS)
                {
                    release_win_ptr( win );
                    goto other_process;
                }
                release_win_ptr( win );
                if (parent->flags & WIN_CHILDREN_MOVED)
                {
                    release_win_ptr( parent );
                    goto other_process;
                }
                win = parent;
                if (win->parent)
                {
                    offset_rect( &window, win->client_rect.left, win->client_rect.top );
                    offset_rect( &client, win->client_rect.left, win->client_rect.top );
                }
            }
            break;
        }
        if (window_rect) *window_rect = map_dpi_rect( window, window_dpi, dpi );
        if (client_rect) *client_rect = map_dpi_rect( client, window_dpi, dpi );
        release_win_ptr( win );
        return TRUE;
    }

other_process:
    SERVER_START_REQ( get_window_rectangles )
    {
        req->handle = wine_server_user_handle( hwnd );
        req->relative = relative;
        req->dpi = dpi;
        if ((ret = !wine_server_call_err( req )))
        {
            if (window_rect)
            {
                window_rect->left   = reply->window.left;
                window_rect->top    = reply->window.top;
                window_rect->right  = reply->window.right;
                window_rect->bottom = reply->window.bottom;
            }
            if (client_rect)
            {
                client_rect->left   = reply->client.left;
                client_rect->top    = reply->client.top;
                client_rect->right  = reply->client.right;
                client_rect->bottom = reply->client.bottom;
            }
        }
    }
    SERVER_END_REQ;
    return ret;
}

/* see GetWindowRect */
BOOL get_window_rect( HWND hwnd, RECT *rect, UINT dpi )
{
    return get_window_rects( hwnd, COORDS_SCREEN, rect, NULL, dpi );
}

/* see GetClientRect */
static BOOL get_client_rect( HWND hwnd, RECT *rect )
{
    return get_window_rects( hwnd, COORDS_CLIENT, NULL, rect, get_thread_dpi() );
}

/* see GetWindowInfo */
static BOOL get_window_info( HWND hwnd, WINDOWINFO *info )
{

    if (!info || !get_window_rects( hwnd, COORDS_SCREEN, &info->rcWindow,
                                    &info->rcClient, get_thread_dpi() ))
        return FALSE;

    info->dwStyle         = get_window_long( hwnd, GWL_STYLE );
    info->dwExStyle       = get_window_long( hwnd, GWL_EXSTYLE );
    info->dwWindowStatus  = get_active_window() == hwnd ? WS_ACTIVECAPTION : 0;
    info->cxWindowBorders = info->rcClient.left - info->rcWindow.left;
    info->cyWindowBorders = info->rcWindow.bottom - info->rcClient.bottom;
    info->atomWindowType  = get_class_long( hwnd, GCW_ATOM, FALSE );
    info->wCreatorVersion = 0x0400;
    return TRUE;
}

/*******************************************************************
 *           NtUserGetWindowRgnEx (win32u.@)
 */
int WINAPI NtUserGetWindowRgnEx( HWND hwnd, HRGN hrgn, UINT unk )
{
    NTSTATUS status;
    HRGN win_rgn = 0;
    RGNDATA *data;
    size_t size = 256;
    int ret = ERROR;

    do
    {
        if (!(data = malloc( sizeof(*data) + size - 1 )))
        {
            SetLastError( ERROR_OUTOFMEMORY );
            return ERROR;
        }
        SERVER_START_REQ( get_window_region )
        {
            req->window = wine_server_user_handle( hwnd );
            wine_server_set_reply( req, data->Buffer, size );
            if (!(status = wine_server_call( req )))
            {
                size_t reply_size = wine_server_reply_size( reply );
                if (reply_size)
                {
                    data->rdh.dwSize   = sizeof(data->rdh);
                    data->rdh.iType    = RDH_RECTANGLES;
                    data->rdh.nCount   = reply_size / sizeof(RECT);
                    data->rdh.nRgnSize = reply_size;
                    win_rgn = NtGdiExtCreateRegion( NULL, data->rdh.dwSize + data->rdh.nRgnSize, data );
                }
            }
            else size = reply->total_size;
        }
        SERVER_END_REQ;
        free( data );
    } while (status == STATUS_BUFFER_OVERFLOW);

    if (set_ntstatus( status ) && win_rgn)
    {
        ret = NtGdiCombineRgn( hrgn, win_rgn, 0, RGN_COPY );
        NtGdiDeleteObjectApp( win_rgn );
    }
    return ret;
}

/***********************************************************************
 *           NtUserSetWindowRgn (win32u.@)
 */
int WINAPI NtUserSetWindowRgn( HWND hwnd, HRGN hrgn, BOOL redraw )
{
    static const RECT empty_rect;
    BOOL ret;

    if (hrgn)
    {
        RGNDATA *data;
        DWORD size;

        if (!(size = NtGdiGetRegionData( hrgn, 0, NULL ))) return FALSE;
        if (!(data = malloc( size ))) return FALSE;
        if (!NtGdiGetRegionData( hrgn, size, data ))
        {
            free( data );
            return FALSE;
        }
        SERVER_START_REQ( set_window_region )
        {
            req->window = wine_server_user_handle( hwnd );
            req->redraw = redraw != 0;
            if (data->rdh.nCount)
                wine_server_add_data( req, data->Buffer, data->rdh.nCount * sizeof(RECT) );
            else
                wine_server_add_data( req, &empty_rect, sizeof(empty_rect) );
            ret = !wine_server_call_err( req );
        }
        SERVER_END_REQ;
        free( data );
    }
    else  /* clear existing region */
    {
        SERVER_START_REQ( set_window_region )
        {
            req->window = wine_server_user_handle( hwnd );
            req->redraw = redraw != 0;
            ret = !wine_server_call_err( req );
        }
        SERVER_END_REQ;
    }

    if (ret)
    {
        UINT swp_flags = SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE | SWP_FRAMECHANGED |
            SWP_NOCLIENTSIZE | SWP_NOCLIENTMOVE;
        if (!redraw) swp_flags |= SWP_NOREDRAW;
        user_driver->pSetWindowRgn( hwnd, hrgn, redraw );
        NtUserSetWindowPos( hwnd, 0, 0, 0, 0, 0, swp_flags );
        if (hrgn) NtGdiDeleteObjectApp( hrgn );
    }
    return ret;
}

/***********************************************************************
 *           NtUserMoveWindow (win32u.@)
 */
BOOL WINAPI NtUserMoveWindow( HWND hwnd, INT x, INT y, INT cx, INT cy, BOOL repaint )
{
    int flags = SWP_NOZORDER | SWP_NOACTIVATE;
    if (!repaint) flags |= SWP_NOREDRAW;
    TRACE( "%p %d,%d %dx%d %d\n", hwnd, x, y, cx, cy, repaint );
    return NtUserSetWindowPos( hwnd, 0, x, y, cx, cy, flags );
}

/*****************************************************************************
 *           NtUserGetLayeredWindowAttributes (win32u.@)
 */
BOOL WINAPI NtUserGetLayeredWindowAttributes( HWND hwnd, COLORREF *key, BYTE *alpha, DWORD *flags )
{
    BOOL ret;

    SERVER_START_REQ( get_window_layered_info )
    {
        req->handle = wine_server_user_handle( hwnd );
        if ((ret = !wine_server_call_err( req )))
        {
            if (key) *key = reply->color_key;
            if (alpha) *alpha = reply->alpha;
            if (flags) *flags = reply->flags;
        }
    }
    SERVER_END_REQ;

    return ret;
}

/*****************************************************************************
 *           NtUserSetLayeredWindowAttributes (win32u.@)
 */
BOOL WINAPI NtUserSetLayeredWindowAttributes( HWND hwnd, COLORREF key, BYTE alpha, DWORD flags )
{
    BOOL ret;

    TRACE( "(%p,%08x,%d,%x)\n", hwnd, key, alpha, flags );

    SERVER_START_REQ( set_window_layered_info )
    {
        req->handle = wine_server_user_handle( hwnd );
        req->color_key = key;
        req->alpha = alpha;
        req->flags = flags;
        ret = !wine_server_call_err( req );
    }
    SERVER_END_REQ;

    if (ret)
    {
        user_driver->pSetLayeredWindowAttributes( hwnd, key, alpha, flags );
        update_window_state( hwnd );
    }

    return ret;
}

/*****************************************************************************
 *           UpdateLayeredWindow (win32u.@)
 */
BOOL WINAPI NtUserUpdateLayeredWindow( HWND hwnd, HDC hdc_dst, const POINT *pts_dst, const SIZE *size,
                                       HDC hdc_src, const POINT *pts_src, COLORREF key,
                                       const BLENDFUNCTION *blend, DWORD flags, const RECT *dirty )
{
    DWORD swp_flags = SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOREDRAW;
    RECT window_rect, client_rect;
    UPDATELAYEREDWINDOWINFO info;
    SIZE offset;

    if (flags & ~(ULW_COLORKEY | ULW_ALPHA | ULW_OPAQUE | ULW_EX_NORESIZE) ||
        !(get_window_long( hwnd, GWL_EXSTYLE ) & WS_EX_LAYERED) ||
        NtUserGetLayeredWindowAttributes( hwnd, NULL, NULL, NULL ))
    {
        SetLastError( ERROR_INVALID_PARAMETER );
        return FALSE;
    }

    get_window_rects( hwnd, COORDS_PARENT, &window_rect, &client_rect, get_thread_dpi() );

    if (pts_dst)
    {
        offset.cx = pts_dst->x - window_rect.left;
        offset.cy = pts_dst->y - window_rect.top;
        OffsetRect( &client_rect, offset.cx, offset.cy );
        OffsetRect( &window_rect, offset.cx, offset.cy );
        swp_flags &= ~SWP_NOMOVE;
    }
    if (size)
    {
        offset.cx = size->cx - (window_rect.right - window_rect.left);
        offset.cy = size->cy - (window_rect.bottom - window_rect.top);
        if (size->cx <= 0 || size->cy <= 0)
        {
            SetLastError( ERROR_INVALID_PARAMETER );
            return FALSE;
        }
        if ((flags & ULW_EX_NORESIZE) && (offset.cx || offset.cy))
        {
            SetLastError( ERROR_INCORRECT_SIZE );
            return FALSE;
        }
        client_rect.right  += offset.cx;
        client_rect.bottom += offset.cy;
        window_rect.right  += offset.cx;
        window_rect.bottom += offset.cy;
        swp_flags &= ~SWP_NOSIZE;
    }

    TRACE( "window %p win %s client %s\n", hwnd,
           wine_dbgstr_rect(&window_rect), wine_dbgstr_rect(&client_rect) );

    if (user_callbacks)
        user_callbacks->set_window_pos( hwnd, 0, swp_flags, &window_rect, &client_rect, NULL );

    info.cbSize   = sizeof(info);
    info.hdcDst   = hdc_dst;
    info.pptDst   = pts_dst;
    info.psize    = size;
    info.hdcSrc   = hdc_src;
    info.pptSrc   = pts_src;
    info.crKey    = key;
    info.pblend   = blend;
    info.dwFlags  = flags;
    info.prcDirty = dirty;
    return user_driver->pUpdateLayeredWindow( hwnd, &info, &window_rect );
}

/***********************************************************************
 *           list_children_from_point
 *
 * Get the list of children that can contain point from the server.
 * Point is in screen coordinates.
 * Returned list must be freed by caller.
 */
static HWND *list_children_from_point( HWND hwnd, POINT pt )
{
    int i, size = 128;
    HWND *list;

    for (;;)
    {
        int count = 0;

        if (!(list = malloc( size * sizeof(HWND) ))) break;

        SERVER_START_REQ( get_window_children_from_point )
        {
            req->parent = wine_server_user_handle( hwnd );
            req->x = pt.x;
            req->y = pt.y;
            req->dpi = get_thread_dpi();
            wine_server_set_reply( req, list, (size-1) * sizeof(user_handle_t) );
            if (!wine_server_call( req )) count = reply->count;
        }
        SERVER_END_REQ;
        if (count && count < size)
        {
            /* start from the end since HWND is potentially larger than user_handle_t */
            for (i = count - 1; i >= 0; i--)
                list[i] = wine_server_ptr_handle( ((user_handle_t *)list)[i] );
            list[count] = 0;
            return list;
        }
        free( list );
        if (!count) break;
        size = count + 1;  /* restart with a large enough buffer */
    }
    return NULL;
}

/***********************************************************************
 *           window_from_point
 *
 * Find the window and hittest for a given point.
 */
static HWND window_from_point( HWND hwnd, POINT pt, INT *hittest )
{
    int i, res;
    HWND ret, *list;
    POINT win_pt;

    if (!hwnd) hwnd = get_desktop_window();

    *hittest = HTNOWHERE;

    if (!(list = list_children_from_point( hwnd, pt ))) return 0;

    /* now determine the hittest */

    for (i = 0; list[i]; i++)
    {
        LONG style = get_window_long( list[i], GWL_STYLE );

        /* If window is minimized or disabled, return at once */
        if (style & WS_DISABLED)
        {
            *hittest = HTERROR;
            break;
        }
        /* Send WM_NCCHITTEST (if same thread) */
        if (!is_current_thread_window( list[i] ))
        {
            *hittest = HTCLIENT;
            break;
        }
        win_pt = map_dpi_point( pt, get_thread_dpi(), get_dpi_for_window( list[i] ));
        res = send_message( list[i], WM_NCHITTEST, 0, MAKELPARAM( win_pt.x, win_pt.y ));
        if (res != HTTRANSPARENT)
        {
            *hittest = res;  /* Found the window */
            break;
        }
        /* continue search with next window in z-order */
    }
    ret = list[i];
    free( list );
    TRACE( "scope %p (%d,%d) returning %p\n", hwnd, pt.x, pt.y, ret );
    return ret;
}

/*******************************************************************
 *           NtUserWindowFromPoint (win32u.@)
 */
HWND WINAPI NtUserWindowFromPoint( LONG x, LONG y )
{
    POINT pt = { .x = x, .y = y };
    INT hittest;
    return window_from_point( 0, pt, &hittest );
}

/*******************************************************************
 *           get_work_rect
 *
 * Get the work area that a maximized window can cover, depending on style.
 */
static BOOL get_work_rect( HWND hwnd, RECT *rect )
{
    HMONITOR monitor = monitor_from_window( hwnd, MONITOR_DEFAULTTOPRIMARY, get_thread_dpi() );
    MONITORINFO mon_info;
    DWORD style;

    if (!monitor) return FALSE;

    mon_info.cbSize = sizeof(mon_info);
    get_monitor_info( monitor, &mon_info );
    *rect = mon_info.rcMonitor;

    style = get_window_long( hwnd, GWL_STYLE );
    if (style & WS_MAXIMIZEBOX)
    {
        if ((style & WS_CAPTION) == WS_CAPTION || !(style & (WS_CHILD | WS_POPUP)))
            *rect = mon_info.rcWork;
    }
    return TRUE;
}

static RECT get_maximized_work_rect( HWND hwnd )
{
    RECT work_rect = { 0 };

    if ((get_window_long( hwnd, GWL_STYLE ) & (WS_MINIMIZE | WS_MAXIMIZE)) == WS_MAXIMIZE)
    {
        if (!get_work_rect( hwnd, &work_rect ))
            work_rect = get_primary_monitor_rect( get_thread_dpi() );
    }
    return work_rect;
}

/*******************************************************************
 *           update_maximized_pos
 *
 * For top level windows covering the work area, we might have to
 * "forget" the maximized position. Windows presumably does this
 * to avoid situations where the border style changes, which would
 * lead the window to be outside the screen, or the window gets
 * reloaded on a different screen, and the "saved" position no
 * longer applies to it (despite being maximized).
 *
 * Some applications (e.g. Imperiums: Greek Wars) depend on this.
 */
static void update_maximized_pos( WND *wnd, RECT *work_rect )
{
    if (wnd->parent && wnd->parent != get_desktop_window())
        return;

    if (wnd->dwStyle & WS_MAXIMIZE)
    {
        if (wnd->window_rect.left  <= work_rect->left  && wnd->window_rect.top    <= work_rect->top &&
            wnd->window_rect.right >= work_rect->right && wnd->window_rect.bottom >= work_rect->bottom)
            wnd->max_pos.x = wnd->max_pos.y = -1;
    }
    else
        wnd->max_pos.x = wnd->max_pos.y = -1;
}

static BOOL empty_point( POINT pt )
{
    return pt.x == -1 && pt.y == -1;
}

/* see GetWindowPlacement */
BOOL get_window_placement( HWND hwnd, WINDOWPLACEMENT *placement )
{
    RECT work_rect = get_maximized_work_rect( hwnd );
    WND *win = get_win_ptr( hwnd );
    UINT win_dpi;

    if (!win) return FALSE;

    if (win == WND_DESKTOP)
    {
        placement->length  = sizeof(*placement);
        placement->showCmd = SW_SHOWNORMAL;
        placement->flags = 0;
        placement->ptMinPosition.x = -1;
        placement->ptMinPosition.y = -1;
        placement->ptMaxPosition.x = -1;
        placement->ptMaxPosition.y = -1;
        get_window_rect( hwnd, &placement->rcNormalPosition, get_thread_dpi() );
        return TRUE;
    }
    if (win == WND_OTHER_PROCESS)
    {
        RECT normal_position;
        DWORD style;

        if (!get_window_rect( hwnd, &normal_position, get_thread_dpi() ))
            return FALSE;

        FIXME("not fully supported on other process window %p.\n", hwnd);

        placement->length  = sizeof(*placement);
        style = get_window_long( hwnd, GWL_STYLE );
        if (style & WS_MINIMIZE)
            placement->showCmd = SW_SHOWMINIMIZED;
        else
            placement->showCmd = (style & WS_MAXIMIZE) ? SW_SHOWMAXIMIZED : SW_SHOWNORMAL;
        /* provide some dummy information */
        placement->flags = 0;
        placement->ptMinPosition.x = -1;
        placement->ptMinPosition.y = -1;
        placement->ptMaxPosition.x = -1;
        placement->ptMaxPosition.y = -1;
        placement->rcNormalPosition = normal_position;
        return TRUE;
    }

    /* update the placement according to the current style */
    if (win->dwStyle & WS_MINIMIZE)
    {
        win->min_pos.x = win->window_rect.left;
        win->min_pos.y = win->window_rect.top;
    }
    else if (win->dwStyle & WS_MAXIMIZE)
    {
        win->max_pos.x = win->window_rect.left;
        win->max_pos.y = win->window_rect.top;
    }
    else
    {
        win->normal_rect = win->window_rect;
    }
    update_maximized_pos( win, &work_rect );

    placement->length  = sizeof(*placement);
    if (win->dwStyle & WS_MINIMIZE)
        placement->showCmd = SW_SHOWMINIMIZED;
    else
        placement->showCmd = ( win->dwStyle & WS_MAXIMIZE ) ? SW_SHOWMAXIMIZED : SW_SHOWNORMAL ;
    if (win->flags & WIN_RESTORE_MAX)
        placement->flags = WPF_RESTORETOMAXIMIZED;
    else
        placement->flags = 0;
    win_dpi = get_dpi_for_window( hwnd );
    placement->ptMinPosition = empty_point(win->min_pos) ? win->min_pos
        : map_dpi_point( win->min_pos, win_dpi, get_thread_dpi() );
    placement->ptMaxPosition = empty_point(win->max_pos) ? win->max_pos
        : map_dpi_point( win->max_pos, win_dpi, get_thread_dpi() );
    placement->rcNormalPosition = map_dpi_rect( win->normal_rect, win_dpi, get_thread_dpi() );
    release_win_ptr( win );

    TRACE( "%p: returning min %d,%d max %d,%d normal %s\n",
           hwnd, placement->ptMinPosition.x, placement->ptMinPosition.y,
           placement->ptMaxPosition.x, placement->ptMaxPosition.y,
           wine_dbgstr_rect(&placement->rcNormalPosition) );
    return TRUE;
}

/*****************************************************************************
 *           NtUserShowWindow (win32u.@)
 */
BOOL WINAPI NtUserShowWindow( HWND hwnd, INT cmd )
{
    return user_callbacks && user_callbacks->pShowWindow( hwnd, cmd );
}

/*****************************************************************************
 *           NtUserBuildHwndList (win32u.@)
 */
NTSTATUS WINAPI NtUserBuildHwndList( HDESK desktop, ULONG unk2, ULONG unk3, ULONG unk4,
                                     ULONG thread_id, ULONG count, HWND *buffer, ULONG *size )
{
    user_handle_t *list = (user_handle_t *)buffer;
    int i;
    NTSTATUS status;

    SERVER_START_REQ( get_window_children )
    {
        req->desktop = wine_server_obj_handle( desktop );
        req->tid = thread_id;
        if (count) wine_server_set_reply( req, list, (count - 1) * sizeof(user_handle_t) );
        status = wine_server_call( req );
        if (status && status != STATUS_BUFFER_TOO_SMALL) return status;
        *size = reply->count + 1;
    }
    SERVER_END_REQ;
    if (*size > count) return STATUS_BUFFER_TOO_SMALL;

    /* start from the end since HWND is potentially larger than user_handle_t */
    for (i = *size - 2; i >= 0; i--)
        buffer[i] = wine_server_ptr_handle( list[i] );
    buffer[*size - 1] = HWND_BOTTOM;
    return STATUS_SUCCESS;
}

/* Retrieve the window text from the server. */
static data_size_t get_server_window_text( HWND hwnd, WCHAR *text, data_size_t count )
{
    data_size_t len = 0, needed = 0;

    SERVER_START_REQ( get_window_text )
    {
        req->handle = wine_server_user_handle( hwnd );
        if (count) wine_server_set_reply( req, text, (count - 1) * sizeof(WCHAR) );
        if (!wine_server_call_err( req ))
        {
            needed = reply->length;
            len = wine_server_reply_size(reply);
        }
    }
    SERVER_END_REQ;
    if (text) text[len / sizeof(WCHAR)] = 0;
    return needed;
}

/*******************************************************************
 *           NtUserInternalGetWindowText (win32u.@)
 */
INT WINAPI NtUserInternalGetWindowText( HWND hwnd, WCHAR *text, INT count )
{
    WND *win;

    if (count <= 0) return 0;
    if (!(win = get_win_ptr( hwnd ))) return 0;
    if (win == WND_DESKTOP) text[0] = 0;
    else if (win != WND_OTHER_PROCESS)
    {
        if (win->text) lstrcpynW( text, win->text, count );
        else text[0] = 0;
        release_win_ptr( win );
    }
    else
    {
        get_server_window_text( hwnd, text, count );
    }
    return lstrlenW(text);
}

/*******************************************************************
 *         get_windows_offset
 *
 * Calculate the offset between the origin of the two windows. Used
 * to implement MapWindowPoints.
 */
static BOOL get_windows_offset( HWND hwnd_from, HWND hwnd_to, UINT dpi, BOOL *mirrored, POINT *ret_offset )
{
    WND *win;
    POINT offset;
    BOOL mirror_from, mirror_to, ret;
    HWND hwnd;

    offset.x = offset.y = 0;
    *mirrored = mirror_from = mirror_to = FALSE;

    /* Translate source window origin to screen coords */
    if (hwnd_from)
    {
        if (!(win = get_win_ptr( hwnd_from )))
        {
            SetLastError( ERROR_INVALID_WINDOW_HANDLE );
            return FALSE;
        }
        if (win == WND_OTHER_PROCESS) goto other_process;
        if (win != WND_DESKTOP)
        {
            if (win->dwExStyle & WS_EX_LAYOUTRTL)
            {
                mirror_from = TRUE;
                offset.x += win->client_rect.right - win->client_rect.left;
            }
            while (win->parent)
            {
                offset.x += win->client_rect.left;
                offset.y += win->client_rect.top;
                hwnd = win->parent;
                release_win_ptr( win );
                if (!(win = get_win_ptr( hwnd ))) break;
                if (win == WND_OTHER_PROCESS) goto other_process;
                if (win == WND_DESKTOP) break;
                if (win->flags & WIN_CHILDREN_MOVED)
                {
                    release_win_ptr( win );
                    goto other_process;
                }
            }
            if (win && win != WND_DESKTOP) release_win_ptr( win );
            offset = map_dpi_point( offset, get_dpi_for_window( hwnd_from ), dpi );
        }
    }

    /* Translate origin to destination window coords */
    if (hwnd_to)
    {
        if (!(win = get_win_ptr( hwnd_to )))
        {
            SetLastError( ERROR_INVALID_WINDOW_HANDLE );
            return FALSE;
        }
        if (win == WND_OTHER_PROCESS) goto other_process;
        if (win != WND_DESKTOP)
        {
            POINT pt = { 0, 0 };
            if (win->dwExStyle & WS_EX_LAYOUTRTL)
            {
                mirror_to = TRUE;
                pt.x += win->client_rect.right - win->client_rect.left;
            }
            while (win->parent)
            {
                pt.x += win->client_rect.left;
                pt.y += win->client_rect.top;
                hwnd = win->parent;
                release_win_ptr( win );
                if (!(win = get_win_ptr( hwnd ))) break;
                if (win == WND_OTHER_PROCESS) goto other_process;
                if (win == WND_DESKTOP) break;
                if (win->flags & WIN_CHILDREN_MOVED)
                {
                    release_win_ptr( win );
                    goto other_process;
                }
            }
            if (win && win != WND_DESKTOP) release_win_ptr( win );
            pt = map_dpi_point( pt, get_dpi_for_window( hwnd_to ), dpi );
            offset.x -= pt.x;
            offset.y -= pt.y;
        }
    }

    *mirrored = mirror_from ^ mirror_to;
    if (mirror_from) offset.x = -offset.x;
    *ret_offset = offset;
    return TRUE;

other_process:  /* one of the parents may belong to another process, do it the hard way */
    SERVER_START_REQ( get_windows_offset )
    {
        req->from = wine_server_user_handle( hwnd_from );
        req->to   = wine_server_user_handle( hwnd_to );
        req->dpi  = dpi;
        if ((ret = !wine_server_call_err( req )))
        {
            ret_offset->x = reply->x;
            ret_offset->y = reply->y;
            *mirrored = reply->mirror;
        }
    }
    SERVER_END_REQ;
    return ret;
}

/* map coordinates of a window region */
void map_window_region( HWND from, HWND to, HRGN hrgn )
{
    BOOL mirrored;
    POINT offset;
    UINT i, size;
    RGNDATA *data;
    HRGN new_rgn;
    RECT *rect;

    if (!get_windows_offset( from, to, get_thread_dpi(), &mirrored, &offset )) return;

    if (!mirrored)
    {
        NtGdiOffsetRgn( hrgn, offset.x, offset.y );
        return;
    }
    if (!(size = NtGdiGetRegionData( hrgn, 0, NULL ))) return;
    if (!(data = malloc( size ))) return;
    NtGdiGetRegionData( hrgn, size, data );
    rect = (RECT *)data->Buffer;
    for (i = 0; i < data->rdh.nCount; i++)
    {
        int tmp = -(rect[i].left + offset.x);
        rect[i].left    = -(rect[i].right + offset.x);
        rect[i].right   = tmp;
        rect[i].top    += offset.y;
        rect[i].bottom += offset.y;
    }
    if ((new_rgn = NtGdiExtCreateRegion( NULL, data->rdh.dwSize + data->rdh.nRgnSize, data )))
    {
        NtGdiCombineRgn( hrgn, new_rgn, 0, RGN_COPY );
        NtGdiDeleteObjectApp( new_rgn );
    }
    free( data );
}

/* see MapWindowPoints */
int map_window_points( HWND hwnd_from, HWND hwnd_to, POINT *points, UINT count, UINT dpi )
{
    BOOL mirrored;
    POINT offset;
    UINT i;

    if (!get_windows_offset( hwnd_from, hwnd_to, dpi, &mirrored, &offset )) return 0;

    for (i = 0; i < count; i++)
    {
        points[i].x += offset.x;
        points[i].y += offset.y;
        if (mirrored) points[i].x = -points[i].x;
    }
    if (mirrored && count == 2)  /* special case for rectangle */
    {
        int tmp = points[0].x;
        points[0].x = points[1].x;
        points[1].x = tmp;
    }
    return MAKELONG( LOWORD(offset.x), LOWORD(offset.y) );
}

/***********************************************************************
 *           dump_winpos_flags
 */
static void dump_winpos_flags( UINT flags )
{
    static const DWORD dumped_flags = (SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER | SWP_NOREDRAW |
                                       SWP_NOACTIVATE | SWP_FRAMECHANGED | SWP_SHOWWINDOW |
                                       SWP_HIDEWINDOW | SWP_NOCOPYBITS | SWP_NOOWNERZORDER |
                                       SWP_NOSENDCHANGING | SWP_DEFERERASE | SWP_ASYNCWINDOWPOS |
                                       SWP_NOCLIENTSIZE | SWP_NOCLIENTMOVE | SWP_STATECHANGED);
    TRACE( "flags:" );
    if(flags & SWP_NOSIZE) TRACE( " SWP_NOSIZE" );
    if(flags & SWP_NOMOVE) TRACE( " SWP_NOMOVE" );
    if(flags & SWP_NOZORDER) TRACE( " SWP_NOZORDER" );
    if(flags & SWP_NOREDRAW) TRACE( " SWP_NOREDRAW" );
    if(flags & SWP_NOACTIVATE) TRACE( " SWP_NOACTIVATE" );
    if(flags & SWP_FRAMECHANGED) TRACE( " SWP_FRAMECHANGED" );
    if(flags & SWP_SHOWWINDOW) TRACE( " SWP_SHOWWINDOW" );
    if(flags & SWP_HIDEWINDOW) TRACE( " SWP_HIDEWINDOW" );
    if(flags & SWP_NOCOPYBITS) TRACE( " SWP_NOCOPYBITS" );
    if(flags & SWP_NOOWNERZORDER) TRACE( " SWP_NOOWNERZORDER" );
    if(flags & SWP_NOSENDCHANGING) TRACE( " SWP_NOSENDCHANGING" );
    if(flags & SWP_DEFERERASE) TRACE( " SWP_DEFERERASE" );
    if(flags & SWP_ASYNCWINDOWPOS) TRACE( " SWP_ASYNCWINDOWPOS" );
    if(flags & SWP_NOCLIENTSIZE) TRACE( " SWP_NOCLIENTSIZE" );
    if(flags & SWP_NOCLIENTMOVE) TRACE( " SWP_NOCLIENTMOVE" );
    if(flags & SWP_STATECHANGED) TRACE( " SWP_STATECHANGED" );

    if(flags & ~dumped_flags) TRACE( " %08x", flags & ~dumped_flags );
    TRACE( "\n" );
}

/***********************************************************************
 *           map_dpi_winpos
 */
static void map_dpi_winpos( WINDOWPOS *winpos )
{
    UINT dpi_from = get_thread_dpi();
    UINT dpi_to = get_dpi_for_window( winpos->hwnd );

    if (!dpi_from) dpi_from = get_win_monitor_dpi( winpos->hwnd );
    if (dpi_from == dpi_to) return;
    winpos->x  = muldiv( winpos->x, dpi_to, dpi_from );
    winpos->y  = muldiv( winpos->y, dpi_to, dpi_from );
    winpos->cx = muldiv( winpos->cx, dpi_to, dpi_from );
    winpos->cy = muldiv( winpos->cy, dpi_to, dpi_from );
}

/***********************************************************************
 *           calc_winpos
 */
static BOOL calc_winpos( WINDOWPOS *winpos, RECT *old_window_rect, RECT *old_client_rect,
                                  RECT *new_window_rect, RECT *new_client_rect )
{
    WND *win;

    /* Send WM_WINDOWPOSCHANGING message */
    if (!(winpos->flags & SWP_NOSENDCHANGING)
           && !((winpos->flags & SWP_AGG_NOCLIENTCHANGE) && (winpos->flags & SWP_SHOWWINDOW)))
        send_message( winpos->hwnd, WM_WINDOWPOSCHANGING, 0, (LPARAM)winpos );

    if (!(win = get_win_ptr( winpos->hwnd )) ||
        win == WND_OTHER_PROCESS || win == WND_DESKTOP) return FALSE;

    /* Calculate new position and size */
    get_window_rects( winpos->hwnd, COORDS_PARENT, old_window_rect, old_client_rect, get_thread_dpi() );
    *new_window_rect = *old_window_rect;
    *new_client_rect = *old_client_rect;

    if (!(winpos->flags & SWP_NOSIZE))
    {
        if (win->dwStyle & WS_MINIMIZE)
        {
            new_window_rect->right  = new_window_rect->left + get_system_metrics( SM_CXMINIMIZED );
            new_window_rect->bottom = new_window_rect->top + get_system_metrics( SM_CYMINIMIZED );
        }
        else
        {
            new_window_rect->right  = new_window_rect->left + winpos->cx;
            new_window_rect->bottom = new_window_rect->top + winpos->cy;
        }
    }

    if (!(winpos->flags & SWP_NOMOVE))
    {
        /* If the window is toplevel minimized off-screen, force keep it there */
        if ((win->dwStyle & WS_MINIMIZE) &&
             win->window_rect.left <= -32000 && win->window_rect.top <= -32000 &&
            (!win->parent || win->parent == get_desktop_window()))
        {
            winpos->x = -32000;
            winpos->y = -32000;
        }
        new_window_rect->left    = winpos->x;
        new_window_rect->top     = winpos->y;
        new_window_rect->right  += winpos->x - old_window_rect->left;
        new_window_rect->bottom += winpos->y - old_window_rect->top;

        offset_rect( new_client_rect, winpos->x - old_window_rect->left,
                     winpos->y - old_window_rect->top );
    }
    winpos->flags |= SWP_NOCLIENTMOVE | SWP_NOCLIENTSIZE;

    TRACE( "hwnd %p, after %p, swp %d,%d %dx%d flags %08x current %s style %08x new %s\n",
           winpos->hwnd, winpos->hwndInsertAfter, winpos->x, winpos->y,
           winpos->cx, winpos->cy, winpos->flags,
           wine_dbgstr_rect( old_window_rect ), win->dwStyle,
           wine_dbgstr_rect( new_window_rect ));

    release_win_ptr( win );
    return TRUE;
}

/***********************************************************************
 *           get_valid_rects
 *
 * Compute the valid rects from the old and new client rect and WVR_* flags.
 * Helper for WM_NCCALCSIZE handling.
 */
static inline void get_valid_rects( const RECT *old_client, const RECT *new_client, UINT flags,
                                    RECT *valid )
{
    int cx, cy;

    if (flags & WVR_REDRAW)
    {
        SetRectEmpty( &valid[0] );
        SetRectEmpty( &valid[1] );
        return;
    }

    if (flags & WVR_VALIDRECTS)
    {
        if (!intersect_rect( &valid[0], &valid[0], new_client ) ||
            !intersect_rect( &valid[1], &valid[1], old_client ))
        {
            SetRectEmpty( &valid[0] );
            SetRectEmpty( &valid[1] );
            return;
        }
        flags = WVR_ALIGNLEFT | WVR_ALIGNTOP;
    }
    else
    {
        valid[0] = *new_client;
        valid[1] = *old_client;
    }

    /* make sure the rectangles have the same size */
    cx = min( valid[0].right - valid[0].left, valid[1].right - valid[1].left );
    cy = min( valid[0].bottom - valid[0].top, valid[1].bottom - valid[1].top );

    if (flags & WVR_ALIGNBOTTOM)
    {
        valid[0].top = valid[0].bottom - cy;
        valid[1].top = valid[1].bottom - cy;
    }
    else
    {
        valid[0].bottom = valid[0].top + cy;
        valid[1].bottom = valid[1].top + cy;
    }
    if (flags & WVR_ALIGNRIGHT)
    {
        valid[0].left = valid[0].right - cx;
        valid[1].left = valid[1].right - cx;
    }
    else
    {
        valid[0].right = valid[0].left + cx;
        valid[1].right = valid[1].left + cx;
    }
}

static UINT calc_ncsize( WINDOWPOS *winpos, const RECT *old_window_rect, const RECT *old_client_rect,
                         const RECT *new_window_rect, RECT *new_client_rect, RECT *valid_rects,
                         int parent_x, int parent_y )
{
    UINT wvr_flags = 0;

    /* Send WM_NCCALCSIZE message to get new client area */
    if ((winpos->flags & (SWP_FRAMECHANGED | SWP_NOSIZE)) != SWP_NOSIZE)
    {
        NCCALCSIZE_PARAMS params;
        WINDOWPOS winposCopy;

        params.rgrc[0] = *new_window_rect;
        params.rgrc[1] = *old_window_rect;
        params.rgrc[2] = *old_client_rect;
        params.lppos = &winposCopy;
        winposCopy = *winpos;

        if (winpos->flags & SWP_NOMOVE)
        {
            winposCopy.x = old_window_rect->left;
            winposCopy.y = old_window_rect->top;
        }

        if (winpos->flags & SWP_NOSIZE)
        {
            winposCopy.cx = old_window_rect->right - old_window_rect->left;
            winposCopy.cy = old_window_rect->bottom - old_window_rect->top;
        }

        wvr_flags = send_message( winpos->hwnd, WM_NCCALCSIZE, TRUE, (LPARAM)&params );

        *new_client_rect = params.rgrc[0];

        TRACE( "hwnd %p old win %s old client %s new win %s new client %s\n", winpos->hwnd,
               wine_dbgstr_rect(old_window_rect), wine_dbgstr_rect(old_client_rect),
               wine_dbgstr_rect(new_window_rect), wine_dbgstr_rect(new_client_rect) );

        if (new_client_rect->left != old_client_rect->left - parent_x ||
            new_client_rect->top != old_client_rect->top - parent_y)
            winpos->flags &= ~SWP_NOCLIENTMOVE;

        if ((new_client_rect->right - new_client_rect->left !=
             old_client_rect->right - old_client_rect->left))
            winpos->flags &= ~SWP_NOCLIENTSIZE;
        else
            wvr_flags &= ~WVR_HREDRAW;

        if (new_client_rect->bottom - new_client_rect->top !=
            old_client_rect->bottom - old_client_rect->top)
            winpos->flags &= ~SWP_NOCLIENTSIZE;
        else
            wvr_flags &= ~WVR_VREDRAW;

        valid_rects[0] = params.rgrc[1];
        valid_rects[1] = params.rgrc[2];
    }
    else
    {
        if (!(winpos->flags & SWP_NOMOVE) &&
            (new_client_rect->left != old_client_rect->left - parent_x ||
             new_client_rect->top != old_client_rect->top - parent_y))
            winpos->flags &= ~SWP_NOCLIENTMOVE;
    }

    if (winpos->flags & (SWP_NOCOPYBITS | SWP_NOREDRAW | SWP_SHOWWINDOW | SWP_HIDEWINDOW))
    {
        SetRectEmpty( &valid_rects[0] );
        SetRectEmpty( &valid_rects[1] );
    }
    else get_valid_rects( old_client_rect, new_client_rect, wvr_flags, valid_rects );

    return wvr_flags;
}

/* fix redundant flags and values in the WINDOWPOS structure */
static BOOL fixup_swp_flags( WINDOWPOS *winpos, const RECT *old_window_rect, int parent_x, int parent_y )
{
    HWND parent;
    WND *win = get_win_ptr( winpos->hwnd );
    BOOL ret = TRUE;

    if (!win || win == WND_OTHER_PROCESS)
    {
        SetLastError( ERROR_INVALID_WINDOW_HANDLE );
        return FALSE;
    }
    winpos->hwnd = win->obj.handle;  /* make it a full handle */

    /* Finally make sure that all coordinates are valid */
    if (winpos->x < -32768) winpos->x = -32768;
    else if (winpos->x > 32767) winpos->x = 32767;
    if (winpos->y < -32768) winpos->y = -32768;
    else if (winpos->y > 32767) winpos->y = 32767;

    if (winpos->cx < 0) winpos->cx = 0;
    else if (winpos->cx > 32767) winpos->cx = 32767;
    if (winpos->cy < 0) winpos->cy = 0;
    else if (winpos->cy > 32767) winpos->cy = 32767;

    parent = NtUserGetAncestor( winpos->hwnd, GA_PARENT );
    if (!is_window_visible( parent )) winpos->flags |= SWP_NOREDRAW;

    if (win->dwStyle & WS_VISIBLE) winpos->flags &= ~SWP_SHOWWINDOW;
    else
    {
        winpos->flags &= ~SWP_HIDEWINDOW;
        if (!(winpos->flags & SWP_SHOWWINDOW)) winpos->flags |= SWP_NOREDRAW;
    }

    if ((old_window_rect->right - old_window_rect->left == winpos->cx) &&
        (old_window_rect->bottom - old_window_rect->top == winpos->cy))
        winpos->flags |= SWP_NOSIZE;    /* Already the right size */

    if ((old_window_rect->left - parent_x == winpos->x) && (old_window_rect->top - parent_y == winpos->y))
        winpos->flags |= SWP_NOMOVE;    /* Already the right position */

    if ((win->dwStyle & (WS_POPUP | WS_CHILD)) != WS_CHILD)
    {
        if (!(winpos->flags & (SWP_NOACTIVATE|SWP_HIDEWINDOW)) && /* Bring to the top when activating */
            (winpos->flags & SWP_NOZORDER ||
             (winpos->hwndInsertAfter != HWND_TOPMOST && winpos->hwndInsertAfter != HWND_NOTOPMOST)))
        {
            winpos->flags &= ~SWP_NOZORDER;
            winpos->hwndInsertAfter = HWND_TOP;
        }
    }

    /* Check hwndInsertAfter */
    if (winpos->flags & SWP_NOZORDER) goto done;

    if (winpos->hwndInsertAfter == HWND_TOP)
    {
        if (get_window_relative( winpos->hwnd, GW_HWNDFIRST ) == winpos->hwnd)
            winpos->flags |= SWP_NOZORDER;
    }
    else if (winpos->hwndInsertAfter == HWND_BOTTOM)
    {
        if (!(win->dwExStyle & WS_EX_TOPMOST) &&
            get_window_relative( winpos->hwnd, GW_HWNDLAST ) == winpos->hwnd)
            winpos->flags |= SWP_NOZORDER;
    }
    else if (winpos->hwndInsertAfter == HWND_TOPMOST)
    {
        if ((win->dwExStyle & WS_EX_TOPMOST) &&
            get_window_relative( winpos->hwnd, GW_HWNDFIRST ) == winpos->hwnd)
            winpos->flags |= SWP_NOZORDER;
    }
    else if (winpos->hwndInsertAfter == HWND_NOTOPMOST)
    {
        if (!(win->dwExStyle & WS_EX_TOPMOST))
            winpos->flags |= SWP_NOZORDER;
    }
    else
    {
        if ((winpos->hwnd == winpos->hwndInsertAfter) ||
            (winpos->hwnd == get_window_relative( winpos->hwndInsertAfter, GW_HWNDNEXT )))
            winpos->flags |= SWP_NOZORDER;
    }
 done:
    release_win_ptr( win );
    return ret;
}

/***********************************************************************
 *           swp_owner_popups
 *
 * fix Z order taking into account owned popups -
 * basically we need to maintain them above the window that owns them
 *
 * FIXME: hide/show owned popups when owner visibility changes.
 */
static HWND swp_owner_popups( HWND hwnd, HWND after )
{
    HWND owner, *list = NULL;
    unsigned int i;

    TRACE( "(%p) after = %p\n", hwnd, after );

    if (get_window_long( hwnd, GWL_STYLE ) & WS_CHILD) return after;

    if ((owner = get_window_relative( hwnd, GW_OWNER )))
    {
        /* make sure this popup stays above the owner */

        if (after != HWND_TOPMOST)
        {
            if (!(list = list_window_children( 0, get_desktop_window(), NULL, 0 ))) return after;

            for (i = 0; list[i]; i++)
            {
                BOOL topmost = (get_window_long( list[i], GWL_EXSTYLE ) & WS_EX_TOPMOST) != 0;

                if (list[i] == owner)
                {
                    if (i > 0) after = list[i-1];
                    else after = topmost ? HWND_TOPMOST : HWND_TOP;
                    break;
                }

                if (after == HWND_TOP || after == HWND_NOTOPMOST)
                {
                    if (!topmost) break;
                }
                else if (list[i] == after) break;
            }
        }
    }

    if (after == HWND_BOTTOM) goto done;
    if (!list && !(list = list_window_children( 0, get_desktop_window(), NULL, 0 ))) goto done;

    i = 0;
    if (after == HWND_TOP || after == HWND_NOTOPMOST)
    {
        if (after == HWND_NOTOPMOST ||
            !(get_window_long( hwnd, GWL_EXSTYLE ) & WS_EX_TOPMOST))
        {
            /* skip all the topmost windows */
            while (list[i] && (get_window_long( list[i], GWL_EXSTYLE ) & WS_EX_TOPMOST)) i++;
        }
    }
    else if (after != HWND_TOPMOST)
    {
        /* skip windows that are already placed correctly */
        for (i = 0; list[i]; i++)
        {
            if (list[i] == after) break;
            if (list[i] == hwnd) goto done;  /* nothing to do if window is moving backwards in z-order */
        }
    }

    for ( ; list[i]; i++)
    {
        if (list[i] == hwnd) break;
        if (get_window_relative( list[i], GW_OWNER ) != hwnd) continue;
        TRACE( "moving %p owned by %p after %p\n", list[i], hwnd, after );
        NtUserSetWindowPos( list[i], after, 0, 0, 0, 0,
                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOSENDCHANGING | SWP_DEFERERASE );
        after = list[i];
    }

done:
    free( list );
    return after;
}

/* NtUserSetWindowPos implementation */
BOOL set_window_pos( WINDOWPOS *winpos, int parent_x, int parent_y )
{
    RECT old_window_rect, old_client_rect, new_window_rect, new_client_rect, valid_rects[2];
    UINT orig_flags;
    BOOL ret = FALSE;
    DPI_AWARENESS_CONTEXT context;

    orig_flags = winpos->flags;

    /* First, check z-order arguments.  */
    if (!(winpos->flags & SWP_NOZORDER))
    {
        /* fix sign extension */
        if (winpos->hwndInsertAfter == (HWND)0xffff) winpos->hwndInsertAfter = HWND_TOPMOST;
        else if (winpos->hwndInsertAfter == (HWND)0xfffe) winpos->hwndInsertAfter = HWND_NOTOPMOST;

        if (!(winpos->hwndInsertAfter == HWND_TOP ||
              winpos->hwndInsertAfter == HWND_BOTTOM ||
              winpos->hwndInsertAfter == HWND_TOPMOST ||
              winpos->hwndInsertAfter == HWND_NOTOPMOST))
        {
            HWND parent = NtUserGetAncestor( winpos->hwnd, GA_PARENT );
            HWND insertafter_parent = NtUserGetAncestor( winpos->hwndInsertAfter, GA_PARENT );

            /* hwndInsertAfter must be a sibling of the window */
            if (!insertafter_parent) return FALSE;
            if (insertafter_parent != parent) return TRUE;
        }
    }

    /* Make sure that coordinates are valid for WM_WINDOWPOSCHANGING */
    if (!(winpos->flags & SWP_NOMOVE))
    {
        if (winpos->x < -32768) winpos->x = -32768;
        else if (winpos->x > 32767) winpos->x = 32767;
        if (winpos->y < -32768) winpos->y = -32768;
        else if (winpos->y > 32767) winpos->y = 32767;
    }
    if (!(winpos->flags & SWP_NOSIZE))
    {
        if (winpos->cx < 0) winpos->cx = 0;
        else if (winpos->cx > 32767) winpos->cx = 32767;
        if (winpos->cy < 0) winpos->cy = 0;
        else if (winpos->cy > 32767) winpos->cy = 32767;
    }

    context = set_thread_dpi_awareness_context( get_window_dpi_awareness_context( winpos->hwnd ));

    if (!calc_winpos( winpos, &old_window_rect, &old_client_rect,
                      &new_window_rect, &new_client_rect )) goto done;

    /* Fix redundant flags */
    if (!fixup_swp_flags( winpos, &old_window_rect, parent_x, parent_y )) goto done;

    if((winpos->flags & (SWP_NOZORDER | SWP_HIDEWINDOW | SWP_SHOWWINDOW)) != SWP_NOZORDER)
    {
        if (NtUserGetAncestor( winpos->hwnd, GA_PARENT ) == get_desktop_window())
            winpos->hwndInsertAfter = swp_owner_popups( winpos->hwnd, winpos->hwndInsertAfter );
    }

    /* Common operations */

    calc_ncsize( winpos, &old_window_rect, &old_client_rect,
                 &new_window_rect, &new_client_rect, valid_rects, parent_x, parent_y );

    if (!user_callbacks || !user_callbacks->set_window_pos( winpos->hwnd, winpos->hwndInsertAfter, winpos->flags,
                                                            &new_window_rect, &new_client_rect, valid_rects ))
        goto done;

    if (user_callbacks)
    {
        if (winpos->flags & SWP_HIDEWINDOW)
            user_callbacks->pHideCaret( winpos->hwnd );
        else if (winpos->flags & SWP_SHOWWINDOW)
            user_callbacks->pShowCaret( winpos->hwnd );
    }

    if (!(winpos->flags & (SWP_NOACTIVATE|SWP_HIDEWINDOW)))
    {
        /* child windows get WM_CHILDACTIVATE message */
        if ((get_window_long( winpos->hwnd, GWL_STYLE ) & (WS_CHILD | WS_POPUP)) == WS_CHILD)
            send_message( winpos->hwnd, WM_CHILDACTIVATE, 0, 0 );
        else if (user_callbacks)
            set_foreground_window( winpos->hwnd, FALSE );
    }

    if(!(orig_flags & SWP_DEFERERASE))
    {
        /* erase parent when hiding or resizing child */
        if ((orig_flags & SWP_HIDEWINDOW) ||
         (!(orig_flags & SWP_SHOWWINDOW) &&
          (winpos->flags & SWP_AGG_STATUSFLAGS) != SWP_AGG_NOGEOMETRYCHANGE))
        {
            HWND parent = NtUserGetAncestor( winpos->hwnd, GA_PARENT );
            if (!parent || parent == get_desktop_window()) parent = winpos->hwnd;
            erase_now( parent, 0 );
        }

        /* Give newly shown windows a chance to redraw */
        if(((winpos->flags & SWP_AGG_STATUSFLAGS) != SWP_AGG_NOPOSCHANGE)
                && !(orig_flags & SWP_AGG_NOCLIENTCHANGE) && (orig_flags & SWP_SHOWWINDOW))
        {
            erase_now(winpos->hwnd, 0);
        }
    }

      /* And last, send the WM_WINDOWPOSCHANGED message */

    TRACE( "\tstatus flags = %04x\n", winpos->flags & SWP_AGG_STATUSFLAGS );

    if (((winpos->flags & SWP_AGG_STATUSFLAGS) != SWP_AGG_NOPOSCHANGE)
            && !((orig_flags & SWP_AGG_NOCLIENTCHANGE) && (orig_flags & SWP_SHOWWINDOW)))
    {
        /* WM_WINDOWPOSCHANGED is sent even if SWP_NOSENDCHANGING is set
           and always contains final window position.
         */
        winpos->x  = new_window_rect.left;
        winpos->y  = new_window_rect.top;
        winpos->cx = new_window_rect.right - new_window_rect.left;
        winpos->cy = new_window_rect.bottom - new_window_rect.top;
        send_message( winpos->hwnd, WM_WINDOWPOSCHANGED, 0, (LPARAM)winpos );
    }
    ret = TRUE;
done:
    set_thread_dpi_awareness_context( context );
    return ret;
}

/*******************************************************************
 *           NtUserSetWindowPos (win32u.@)
 */
BOOL WINAPI NtUserSetWindowPos( HWND hwnd, HWND after, INT x, INT y, INT cx, INT cy, UINT flags )
{
    WINDOWPOS winpos;

    TRACE( "hwnd %p, after %p, %d,%d (%dx%d), flags %08x\n", hwnd, after, x, y, cx, cy, flags );
    if(TRACE_ON(win)) dump_winpos_flags(flags);

    if (is_broadcast( hwnd ))
    {
        SetLastError( ERROR_INVALID_PARAMETER );
        return FALSE;
    }

    winpos.hwnd = get_full_window_handle( hwnd );
    winpos.hwndInsertAfter = get_full_window_handle( after );
    winpos.x = x;
    winpos.y = y;
    winpos.cx = cx;
    winpos.cy = cy;
    winpos.flags = flags;

    map_dpi_winpos( &winpos );

    if (is_current_thread_window( hwnd ))
        return set_window_pos( &winpos, 0, 0 );

    if (flags & SWP_ASYNCWINDOWPOS)
        return NtUserMessageCall( winpos.hwnd, WM_WINE_SETWINDOWPOS, 0, (LPARAM)&winpos,
                                  0, FNID_SENDNOTIFYMESSAGE, FALSE );
    else
        return send_message( winpos.hwnd, WM_WINE_SETWINDOWPOS, 0, (LPARAM)&winpos );
}

typedef struct
{
    struct user_object obj;
    INT        count;
    INT        suggested_count;
    HWND       parent;
    WINDOWPOS *winpos;
} DWP;

/* see BeginDeferWindowPos */
HDWP begin_defer_window_pos( INT count )
{
    HDWP handle = 0;
    DWP *dwp;

    TRACE( "%d\n", count );

    if (count < 0)
    {
        SetLastError( ERROR_INVALID_PARAMETER );
        return 0;
    }
    /* Windows allows zero count, in which case it allocates context for 8 moves */
    if (count == 0) count = 8;

    if (!(dwp = malloc( sizeof(DWP) ))) return 0;

    dwp->count  = 0;
    dwp->parent = 0;
    dwp->suggested_count = count;

    if (!(dwp->winpos = malloc( count * sizeof(WINDOWPOS) )) ||
        !(handle = alloc_user_handle( &dwp->obj, NTUSER_OBJ_WINPOS )))
    {
        free( dwp->winpos );
        free( dwp );
    }

    TRACE( "returning %p\n", handle );
    return handle;
}

/***********************************************************************
 *           NtUserDeferWindowPosAndBand (win32u.@)
 */
HDWP WINAPI NtUserDeferWindowPosAndBand( HDWP hdwp, HWND hwnd, HWND after,
                                         INT x, INT y, INT cx, INT cy,
                                         UINT flags, UINT unk1, UINT unk2 )
{
    HDWP retvalue = hdwp;
    WINDOWPOS winpos;
    DWP *dwp;
    int i;

    TRACE( "hdwp %p, hwnd %p, after %p, %d,%d (%dx%d), flags %08x\n",
           hdwp, hwnd, after, x, y, cx, cy, flags );

    winpos.hwnd = get_full_window_handle( hwnd );
    if (is_desktop_window( winpos.hwnd ) || !is_window( winpos.hwnd ))
    {
        SetLastError( ERROR_INVALID_WINDOW_HANDLE );
        return 0;
    }

    winpos.hwndInsertAfter = get_full_window_handle( after );
    winpos.flags = flags;
    winpos.x = x;
    winpos.y = y;
    winpos.cx = cx;
    winpos.cy = cy;
    map_dpi_winpos( &winpos );

    if (!(dwp = get_user_handle_ptr( hdwp, NTUSER_OBJ_WINPOS ))) return 0;
    if (dwp == OBJ_OTHER_PROCESS)
    {
        FIXME( "other process handle %p\n", hdwp );
        return 0;
    }

    for (i = 0; i < dwp->count; i++)
    {
        if (dwp->winpos[i].hwnd == winpos.hwnd)
        {
              /* Merge with the other changes */
            if (!(flags & SWP_NOZORDER))
            {
                dwp->winpos[i].hwndInsertAfter = winpos.hwndInsertAfter;
            }
            if (!(flags & SWP_NOMOVE))
            {
                dwp->winpos[i].x = winpos.x;
                dwp->winpos[i].y = winpos.y;
            }
            if (!(flags & SWP_NOSIZE))
            {
                dwp->winpos[i].cx = winpos.cx;
                dwp->winpos[i].cy = winpos.cy;
            }
            dwp->winpos[i].flags &= flags | ~(SWP_NOSIZE | SWP_NOMOVE |
                                              SWP_NOZORDER | SWP_NOREDRAW |
                                              SWP_NOACTIVATE | SWP_NOCOPYBITS|
                                              SWP_NOOWNERZORDER);
            dwp->winpos[i].flags |= flags & (SWP_SHOWWINDOW | SWP_HIDEWINDOW |
                                             SWP_FRAMECHANGED);
            goto done;
        }
    }
    if (dwp->count >= dwp->suggested_count)
    {
        WINDOWPOS *newpos = realloc( dwp->winpos, dwp->suggested_count * 2 * sizeof(WINDOWPOS) );
        if (!newpos)
        {
            retvalue = 0;
            goto done;
        }
        dwp->suggested_count *= 2;
        dwp->winpos = newpos;
    }
    dwp->winpos[dwp->count++] = winpos;
done:
    release_user_handle_ptr( dwp );
    return retvalue;
}

/***********************************************************************
 *           NtUserEndDeferWindowPosEx (win32u.@)
 */
BOOL WINAPI NtUserEndDeferWindowPosEx( HDWP hdwp, BOOL async )
{
    WINDOWPOS *winpos;
    DWP *dwp;
    int i;

    TRACE( "%p\n", hdwp );

    if (async) FIXME( "async not supported\n" );

    if (!(dwp = free_user_handle( hdwp, NTUSER_OBJ_WINPOS ))) return FALSE;
    if (dwp == OBJ_OTHER_PROCESS)
    {
        FIXME( "other process handle %p\n", hdwp );
        return FALSE;
    }

    for (i = 0, winpos = dwp->winpos; i < dwp->count; i++, winpos++)
    {
        TRACE( "hwnd %p, after %p, %d,%d (%dx%d), flags %08x\n",
               winpos->hwnd, winpos->hwndInsertAfter, winpos->x, winpos->y,
               winpos->cx, winpos->cy, winpos->flags );

        if (is_current_thread_window( winpos->hwnd ))
            set_window_pos( winpos, 0, 0 );
        else
            send_message( winpos->hwnd, WM_WINE_SETWINDOWPOS, 0, (LPARAM)winpos );
    }
    free( dwp->winpos );
    free( dwp );
    return TRUE;
}

/*******************************************************************
 *           update_window_state
 *
 * Trigger an update of the window's driver state and surface.
 */
void update_window_state( HWND hwnd )
{
    DPI_AWARENESS_CONTEXT context;
    RECT window_rect, client_rect, valid_rects[2];

    if (!is_current_thread_window( hwnd ))
    {
        post_message( hwnd, WM_WINE_UPDATEWINDOWSTATE, 0, 0 );
        return;
    }

    context = set_thread_dpi_awareness_context( get_window_dpi_awareness_context( hwnd ));
    get_window_rects( hwnd, COORDS_PARENT, &window_rect, &client_rect, get_thread_dpi() );
    valid_rects[0] = valid_rects[1] = client_rect;
    if (user_callbacks)
        user_callbacks->set_window_pos( hwnd, 0, SWP_NOSIZE | SWP_NOMOVE | SWP_NOCLIENTSIZE | SWP_NOCLIENTMOVE |
                                        SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOREDRAW,
                                        &window_rect, &client_rect, valid_rects );
    set_thread_dpi_awareness_context( context );
}

/*******************************************************************
 *           NtUserFlashWindowEx (win32u.@)
 */
BOOL WINAPI NtUserFlashWindowEx( FLASHWINFO *info )
{
    WND *win;

    TRACE( "%p\n", info );

    if (!info)
    {
        SetLastError( ERROR_NOACCESS );
        return FALSE;
    }

    if (!info->hwnd || info->cbSize != sizeof(FLASHWINFO) || !is_window( info->hwnd ))
    {
        SetLastError( ERROR_INVALID_PARAMETER );
        return FALSE;
    }
    FIXME( "%p - semi-stub\n", info );

    if (is_iconic( info->hwnd ))
    {
        NtUserRedrawWindow( info->hwnd, 0, 0, RDW_INVALIDATE | RDW_ERASE | RDW_UPDATENOW | RDW_FRAME );

        win = get_win_ptr( info->hwnd );
        if (!win || win == WND_OTHER_PROCESS || win == WND_DESKTOP) return FALSE;
        if (info->dwFlags && !(win->flags & WIN_NCACTIVATED))
        {
            win->flags |= WIN_NCACTIVATED;
        }
        else
        {
            win->flags &= ~WIN_NCACTIVATED;
        }
        release_win_ptr( win );
        user_driver->pFlashWindowEx( info );
        return TRUE;
    }
    else
    {
        WPARAM wparam;
        HWND hwnd = info->hwnd;

        win = get_win_ptr( hwnd );
        if (!win || win == WND_OTHER_PROCESS || win == WND_DESKTOP) return FALSE;
        hwnd = win->obj.handle;  /* make it a full handle */

        if (info->dwFlags) wparam = !(win->flags & WIN_NCACTIVATED);
        else wparam = (hwnd == NtUserGetForegroundWindow());

        release_win_ptr( win );
        send_message( hwnd, WM_NCACTIVATE, wparam, 0 );
        user_driver->pFlashWindowEx( info );
        return wparam;
    }
}

/*****************************************************************************
 *           NtUserCallHwnd (win32u.@)
 */
ULONG_PTR WINAPI NtUserCallHwnd( HWND hwnd, DWORD code )
{
    switch (code)
    {
    case NtUserGetDpiForWindow:
        return get_dpi_for_window( hwnd );
    case NtUserGetParent:
        return HandleToUlong( get_parent( hwnd ));
    case NtUserGetWindowDpiAwarenessContext:
        return (ULONG_PTR)get_window_dpi_awareness_context( hwnd );
    case NtUserGetWindowTextLength:
        return get_server_window_text( hwnd, NULL, 0 );
    case NtUserIsWindow:
        return is_window( hwnd );
    case NtUserIsWindowUnicode:
        return is_window_unicode( hwnd );
    case NtUserIsWindowVisible:
        return is_window_visible( hwnd );
    /* temporary exports */
    case NtUserCreateDesktopWindow:
        return user_driver->pCreateDesktopWindow( hwnd );
    case NtUserGetDummySurface:
        return (UINT_PTR)&dummy_surface;
    default:
        FIXME( "invalid code %u\n", code );
        return 0;
    }
}

/*****************************************************************************
 *           NtUserCallHwndParam (win32u.@)
 */
ULONG_PTR WINAPI NtUserCallHwndParam( HWND hwnd, DWORD_PTR param, DWORD code )
{
    switch (code)
    {
    case NtUserGetClassLongA:
        return get_class_long( hwnd, param, TRUE );
    case NtUserGetClassLongW:
        return get_class_long( hwnd, param, FALSE );
    case NtUserGetClassLongPtrA:
        return get_class_long_ptr( hwnd, param, TRUE );
    case NtUserGetClassLongPtrW:
        return get_class_long_ptr( hwnd, param, FALSE );
    case NtUserGetClassWord:
        return get_class_word( hwnd, param );
    case NtUserGetClientRect:
        return get_client_rect( hwnd, (RECT *)param );
    case NtUserGetWindowInfo:
        return get_window_info( hwnd, (WINDOWINFO *)param );
    case NtUserGetWindowLongA:
        return get_window_long_size( hwnd, param, sizeof(LONG), TRUE );
    case NtUserGetWindowLongW:
        return get_window_long( hwnd, param );
    case NtUserGetWindowLongPtrA:
        return get_window_long_ptr( hwnd, param, TRUE );
    case NtUserGetWindowLongPtrW:
        return get_window_long_ptr( hwnd, param, FALSE );
    case NtUserGetWindowPlacement:
        return get_window_placement( hwnd, (WINDOWPLACEMENT *)param );
    case NtUserGetWindowRect:
        return get_window_rect( hwnd, (RECT *)param, get_thread_dpi() );
    case NtUserGetWindowRelative:
        return HandleToUlong( get_window_relative( hwnd, param ));
    case NtUserGetWindowThread:
        return get_window_thread( hwnd, (DWORD *)param );
    case NtUserGetWindowWord:
        return get_window_word( hwnd, param );
    case NtUserIsChild:
        return is_child( hwnd, UlongToHandle(param) );
    case NtUserKillSystemTimer:
        return kill_system_timer( hwnd, param );
    case NtUserMonitorFromWindow:
        return HandleToUlong( monitor_from_window( hwnd, param, NtUserMonitorFromWindow ));
    case NtUserSetCaptureWindow:
        return set_capture_window( hwnd, param, NULL );
    case NtUserSetForegroundWindow:
        return set_foreground_window( hwnd, param );
    case NtUserSetWindowPixelFormat:
        return set_window_pixel_format( hwnd, param );
    /* temporary exports */
    case NtUserIsWindowDrawable:
        return is_window_drawable( hwnd, param );
    case NtUserSetWindowStyle:
        {
            STYLESTRUCT *style = (void *)param;
            return set_window_style( hwnd, style->styleNew, style->styleOld );
        }
    default:
        FIXME( "invalid code %u\n", code );
        return 0;
    }
}