Sweden-Number/dlls/user32/win.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
 */

#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>

#include "user_private.h"
#include "winnls.h"
#include "winver.h"
#include "wine/server.h"
#include "wine/asm.h"
#include "win.h"
#include "controls.h"
#include "winerror.h"
#include "wine/exception.h"
#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(win);

static DWORD process_layout = ~0u;


/***********************************************************************
 *           get_user_handle_ptr
 */
void *get_user_handle_ptr( HANDLE handle, unsigned int type )
{
    return (void *)NtUserCallTwoParam( HandleToUlong(handle), type, NtUserGetHandlePtr );
}


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


/*******************************************************************
 *           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.
 */
static 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 = HeapAlloc( GetProcessHeap(), 0, 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;
        }
        HeapFree( GetProcessHeap(), 0, list );
        if (!count) break;
        size = count + 1;  /* restart with a large enough buffer */
    }
    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) GetDesktopWindow();  /* trigger creation */
    return thread_info->msg_window;
}


/*******************************************************************
 *           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;
}


/*******************************************************************
 *           flush_window_surfaces
 *
 * Flush pending output from all window surfaces.
 */
void flush_window_surfaces( BOOL idle )
{
    NtUserCallOneParam( idle, NtUserFlushWindowSurfaces );
}


/***********************************************************************
 *           WIN_GetPtr
 *
 * 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 *WIN_GetPtr( HWND hwnd )
{
    WND *ptr;

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


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

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


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

    if (!(ptr = WIN_GetPtr( hwnd )) || ptr == WND_OTHER_PROCESS || ptr == WND_DESKTOP) return 0;
    if (ptr->tid == GetCurrentThreadId()) ret = ptr->obj.handle;
    WIN_ReleasePtr( ptr );
    return ret;
}


/***********************************************************************
 *           win_set_flags
 *
 * Set the flags of a window and return the previous value.
 */
UINT win_set_flags( HWND hwnd, UINT set_mask, UINT clear_mask )
{
    UINT ret;
    WND *ptr = WIN_GetPtr( hwnd );

    if (!ptr || ptr == WND_OTHER_PROCESS || ptr == WND_DESKTOP) return 0;
    ret = ptr->flags;
    ptr->flags = (ret & ~clear_mask) | set_mask;
    WIN_ReleasePtr( ptr );
    return ret;
}


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

    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 (!(ptr = WIN_GetPtr( hwnd ))) return hwnd;

    if (ptr == WND_DESKTOP)
    {
        if (LOWORD(hwnd) == LOWORD(GetDesktopWindow())) return GetDesktopWindow();
        else return get_hwnd_message_parent();
    }

    if (ptr != WND_OTHER_PROCESS)
    {
        hwnd = ptr->obj.handle;
        WIN_ReleasePtr( ptr );
    }
    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;
}


/***********************************************************************
 *           WIN_SetStyle
 *
 * Change the style of a window.
 */
ULONG WIN_SetStyle( HWND hwnd, ULONG set_bits, ULONG clear_bits )
{
    /* FIXME: Use SetWindowLong or move callers to win32u instead.
     * We use STYLESTRUCT to pass params, but meaning of its field does not match our usage. */
    STYLESTRUCT style = { .styleNew = set_bits, .styleOld = clear_bits };
    return NtUserCallHwndParam( hwnd, (UINT_PTR)&style, NtUserSetWindowStyle );
}


/***********************************************************************
 *           WIN_GetRectangles
 *
 * Get the window and client rectangles.
 */
BOOL WIN_GetRectangles( HWND hwnd, enum coords_relative relative, RECT *rectWindow, RECT *rectClient )
{
    WND *win = WIN_GetPtr( 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 = rect_win_to_thread_dpi( hwnd, rect );
        }
        else
        {
            rect = get_primary_monitor_rect();
        }
        if (rectWindow) *rectWindow = rect;
        if (rectClient) *rectClient = rect;
        return TRUE;
    }
    if (win != WND_OTHER_PROCESS)
    {
        RECT window_rect = win->window_rect, client_rect = win->client_rect;

        switch (relative)
        {
        case COORDS_CLIENT:
            OffsetRect( &window_rect, -win->client_rect.left, -win->client_rect.top );
            OffsetRect( &client_rect, -win->client_rect.left, -win->client_rect.top );
            if (win->dwExStyle & WS_EX_LAYOUTRTL)
                mirror_rect( &win->client_rect, &window_rect );
            break;
        case COORDS_WINDOW:
            OffsetRect( &window_rect, -win->window_rect.left, -win->window_rect.top );
            OffsetRect( &client_rect, -win->window_rect.left, -win->window_rect.top );
            if (win->dwExStyle & WS_EX_LAYOUTRTL)
                mirror_rect( &win->window_rect, &client_rect );
            break;
        case COORDS_PARENT:
            if (win->parent)
            {
                WND *parent = WIN_GetPtr( win->parent );
                if (parent == WND_DESKTOP) break;
                if (!parent || parent == WND_OTHER_PROCESS)
                {
                    WIN_ReleasePtr( win );
                    goto other_process;
                }
                if (parent->flags & WIN_CHILDREN_MOVED)
                {
                    WIN_ReleasePtr( parent );
                    WIN_ReleasePtr( win );
                    goto other_process;
                }
                if (parent->dwExStyle & WS_EX_LAYOUTRTL)
                {
                    mirror_rect( &parent->client_rect, &window_rect );
                    mirror_rect( &parent->client_rect, &client_rect );
                }
                WIN_ReleasePtr( parent );
            }
            break;
        case COORDS_SCREEN:
            while (win->parent)
            {
                WND *parent = WIN_GetPtr( win->parent );
                if (parent == WND_DESKTOP) break;
                if (!parent || parent == WND_OTHER_PROCESS)
                {
                    WIN_ReleasePtr( win );
                    goto other_process;
                }
                WIN_ReleasePtr( win );
                if (parent->flags & WIN_CHILDREN_MOVED)
                {
                    WIN_ReleasePtr( parent );
                    goto other_process;
                }
                win = parent;
                if (win->parent)
                {
                    OffsetRect( &window_rect, win->client_rect.left, win->client_rect.top );
                    OffsetRect( &client_rect, win->client_rect.left, win->client_rect.top );
                }
            }
            break;
        }
        if (rectWindow) *rectWindow = rect_win_to_thread_dpi( hwnd, window_rect );
        if (rectClient) *rectClient = rect_win_to_thread_dpi( hwnd, client_rect );
        WIN_ReleasePtr( win );
        return TRUE;
    }

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


/***********************************************************************
 *           dump_window_styles
 */
static void dump_window_styles( DWORD style, DWORD exstyle )
{
    TRACE( "style:" );
    if(style & WS_POPUP) TRACE(" WS_POPUP");
    if(style & WS_CHILD) TRACE(" WS_CHILD");
    if(style & WS_MINIMIZE) TRACE(" WS_MINIMIZE");
    if(style & WS_VISIBLE) TRACE(" WS_VISIBLE");
    if(style & WS_DISABLED) TRACE(" WS_DISABLED");
    if(style & WS_CLIPSIBLINGS) TRACE(" WS_CLIPSIBLINGS");
    if(style & WS_CLIPCHILDREN) TRACE(" WS_CLIPCHILDREN");
    if(style & WS_MAXIMIZE) TRACE(" WS_MAXIMIZE");
    if((style & WS_CAPTION) == WS_CAPTION) TRACE(" WS_CAPTION");
    else
    {
        if(style & WS_BORDER) TRACE(" WS_BORDER");
        if(style & WS_DLGFRAME) TRACE(" WS_DLGFRAME");
    }
    if(style & WS_VSCROLL) TRACE(" WS_VSCROLL");
    if(style & WS_HSCROLL) TRACE(" WS_HSCROLL");
    if(style & WS_SYSMENU) TRACE(" WS_SYSMENU");
    if(style & WS_THICKFRAME) TRACE(" WS_THICKFRAME");
    if (style & WS_CHILD)
    {
        if(style & WS_GROUP) TRACE(" WS_GROUP");
        if(style & WS_TABSTOP) TRACE(" WS_TABSTOP");
    }
    else
    {
        if(style & WS_MINIMIZEBOX) TRACE(" WS_MINIMIZEBOX");
        if(style & WS_MAXIMIZEBOX) TRACE(" WS_MAXIMIZEBOX");
    }

    /* FIXME: Add dumping of BS_/ES_/SBS_/LBS_/CBS_/DS_/etc. styles */
#define DUMPED_STYLES \
    ((DWORD)(WS_POPUP | \
     WS_CHILD | \
     WS_MINIMIZE | \
     WS_VISIBLE | \
     WS_DISABLED | \
     WS_CLIPSIBLINGS | \
     WS_CLIPCHILDREN | \
     WS_MAXIMIZE | \
     WS_BORDER | \
     WS_DLGFRAME | \
     WS_VSCROLL | \
     WS_HSCROLL | \
     WS_SYSMENU | \
     WS_THICKFRAME | \
     WS_GROUP | \
     WS_TABSTOP | \
     WS_MINIMIZEBOX | \
     WS_MAXIMIZEBOX))

    if(style & ~DUMPED_STYLES) TRACE(" %08x", style & ~DUMPED_STYLES);
    TRACE("\n");
#undef DUMPED_STYLES

    TRACE( "exstyle:" );
    if(exstyle & WS_EX_DLGMODALFRAME) TRACE(" WS_EX_DLGMODALFRAME");
    if(exstyle & WS_EX_DRAGDETECT) TRACE(" WS_EX_DRAGDETECT");
    if(exstyle & WS_EX_NOPARENTNOTIFY) TRACE(" WS_EX_NOPARENTNOTIFY");
    if(exstyle & WS_EX_TOPMOST) TRACE(" WS_EX_TOPMOST");
    if(exstyle & WS_EX_ACCEPTFILES) TRACE(" WS_EX_ACCEPTFILES");
    if(exstyle & WS_EX_TRANSPARENT) TRACE(" WS_EX_TRANSPARENT");
    if(exstyle & WS_EX_MDICHILD) TRACE(" WS_EX_MDICHILD");
    if(exstyle & WS_EX_TOOLWINDOW) TRACE(" WS_EX_TOOLWINDOW");
    if(exstyle & WS_EX_WINDOWEDGE) TRACE(" WS_EX_WINDOWEDGE");
    if(exstyle & WS_EX_CLIENTEDGE) TRACE(" WS_EX_CLIENTEDGE");
    if(exstyle & WS_EX_CONTEXTHELP) TRACE(" WS_EX_CONTEXTHELP");
    if(exstyle & WS_EX_RIGHT) TRACE(" WS_EX_RIGHT");
    if(exstyle & WS_EX_RTLREADING) TRACE(" WS_EX_RTLREADING");
    if(exstyle & WS_EX_LEFTSCROLLBAR) TRACE(" WS_EX_LEFTSCROLLBAR");
    if(exstyle & WS_EX_CONTROLPARENT) TRACE(" WS_EX_CONTROLPARENT");
    if(exstyle & WS_EX_STATICEDGE) TRACE(" WS_EX_STATICEDGE");
    if(exstyle & WS_EX_APPWINDOW) TRACE(" WS_EX_APPWINDOW");
    if(exstyle & WS_EX_LAYERED) TRACE(" WS_EX_LAYERED");
    if(exstyle & WS_EX_NOINHERITLAYOUT) TRACE(" WS_EX_NOINHERITLAYOUT");
    if(exstyle & WS_EX_LAYOUTRTL) TRACE(" WS_EX_LAYOUTRTL");
    if(exstyle & WS_EX_COMPOSITED) TRACE(" WS_EX_COMPOSITED");
    if(exstyle & WS_EX_NOACTIVATE) TRACE(" WS_EX_NOACTIVATE");

#define DUMPED_EX_STYLES \
    ((DWORD)(WS_EX_DLGMODALFRAME | \
     WS_EX_DRAGDETECT | \
     WS_EX_NOPARENTNOTIFY | \
     WS_EX_TOPMOST | \
     WS_EX_ACCEPTFILES | \
     WS_EX_TRANSPARENT | \
     WS_EX_MDICHILD | \
     WS_EX_TOOLWINDOW | \
     WS_EX_WINDOWEDGE | \
     WS_EX_CLIENTEDGE | \
     WS_EX_CONTEXTHELP | \
     WS_EX_RIGHT | \
     WS_EX_RTLREADING | \
     WS_EX_LEFTSCROLLBAR | \
     WS_EX_CONTROLPARENT | \
     WS_EX_STATICEDGE | \
     WS_EX_APPWINDOW | \
     WS_EX_LAYERED | \
     WS_EX_NOINHERITLAYOUT | \
     WS_EX_LAYOUTRTL | \
     WS_EX_COMPOSITED |\
     WS_EX_NOACTIVATE))

    if(exstyle & ~DUMPED_EX_STYLES) TRACE(" %08x", exstyle & ~DUMPED_EX_STYLES);
    TRACE("\n");
#undef DUMPED_EX_STYLES
}

static BOOL is_default_coord( int x )
{
    return x == CW_USEDEFAULT || x == 0x8000;
}

/***********************************************************************
 *           WIN_CreateWindowEx
 *
 * Implementation of CreateWindowEx().
 */
HWND WIN_CreateWindowEx( CREATESTRUCTW *cs, LPCWSTR className, HINSTANCE module, BOOL unicode )
{
    HWND hwnd, top_child = 0;
    MDICREATESTRUCTW mdi_cs;
    UNICODE_STRING class;
    CBT_CREATEWNDW cbtc;
    WNDCLASSEXW info;
    HMENU menu;

    if (!get_class_info( module, className, &info, &class, FALSE )) return FALSE;

    TRACE("%s %s%s%s ex=%08x style=%08x %d,%d %dx%d parent=%p menu=%p inst=%p params=%p\n",
          unicode ? debugstr_w(cs->lpszName) : debugstr_a((LPCSTR)cs->lpszName),
          debugstr_w(className), class.Buffer != className ? "->" : "",
          class.Buffer != className ? debugstr_wn(class.Buffer, class.Length / sizeof(WCHAR)) : "",
          cs->dwExStyle, cs->style, cs->x, cs->y, cs->cx, cs->cy,
          cs->hwndParent, cs->hMenu, cs->hInstance, cs->lpCreateParams );
    if(TRACE_ON(win)) dump_window_styles( cs->style, cs->dwExStyle );

    /* Fix the styles for MDI children */
    if (cs->dwExStyle & WS_EX_MDICHILD)
    {
        POINT pos[2];
        UINT id = 0;

        if (!(win_get_flags( cs->hwndParent ) & WIN_ISMDICLIENT))
        {
            WARN("WS_EX_MDICHILD, but parent %p is not MDIClient\n", cs->hwndParent);
            return 0;
        }

        /* cs->lpCreateParams of WM_[NC]CREATE is different for MDI children.
         * MDICREATESTRUCT members have the originally passed values.
         *
         * Note: we rely on the fact that MDICREATESTRUCTA and MDICREATESTRUCTW
         * have the same layout.
         */
        mdi_cs.szClass = cs->lpszClass;
        mdi_cs.szTitle = cs->lpszName;
        mdi_cs.hOwner = cs->hInstance;
        mdi_cs.x = cs->x;
        mdi_cs.y = cs->y;
        mdi_cs.cx = cs->cx;
        mdi_cs.cy = cs->cy;
        mdi_cs.style = cs->style;
        mdi_cs.lParam = (LPARAM)cs->lpCreateParams;

        cs->lpCreateParams = &mdi_cs;

        if (GetWindowLongW(cs->hwndParent, GWL_STYLE) & MDIS_ALLCHILDSTYLES)
        {
            if (cs->style & WS_POPUP)
            {
                TRACE("WS_POPUP with MDIS_ALLCHILDSTYLES is not allowed\n");
                return 0;
            }
            cs->style |= WS_CHILD | WS_CLIPSIBLINGS;
        }
        else
        {
            cs->style &= ~WS_POPUP;
            cs->style |= WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CAPTION |
                WS_SYSMENU | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX;
        }

        top_child = GetWindow(cs->hwndParent, GW_CHILD);

        if (top_child)
        {
            /* Restore current maximized child */
            if((cs->style & WS_VISIBLE) && IsZoomed(top_child))
            {
                TRACE("Restoring current maximized child %p\n", top_child);
                if (cs->style & WS_MAXIMIZE)
                {
                    /* if the new window is maximized don't bother repainting */
                    SendMessageW( top_child, WM_SETREDRAW, FALSE, 0 );
                    NtUserShowWindow( top_child, SW_SHOWNORMAL );
                    SendMessageW( top_child, WM_SETREDRAW, TRUE, 0 );
                }
                else NtUserShowWindow( top_child, SW_SHOWNORMAL );
            }
        }

        MDI_CalcDefaultChildPos( cs->hwndParent, -1, pos, 0, &id );
        if (!(cs->style & WS_POPUP)) cs->hMenu = ULongToHandle(id);

        TRACE( "MDI child id %04x\n", id );

        if (cs->style & (WS_CHILD | WS_POPUP))
        {
            if (is_default_coord( cs->x ))
            {
                cs->x = pos[0].x;
                cs->y = pos[0].y;
            }
            if (is_default_coord( cs->cx ) || !cs->cx) cs->cx = pos[1].x;
            if (is_default_coord( cs->cy ) || !cs->cy) cs->cy = pos[1].y;
        }
    }

    /* FIXME: move to win32u */
    if (!cs->hwndParent && className != (const WCHAR *)DESKTOP_CLASS_ATOM &&
        (IS_INTRESOURCE(className) || wcsicmp( className, L"Message" )))
    {
        DWORD layout;
        GetProcessDefaultLayout( &layout );
        if (layout & LAYOUT_RTL) cs->dwExStyle |= WS_EX_LAYOUTRTL;
    }

    menu = cs->hMenu;
    if (!menu && info.lpszMenuName && (cs->style & (WS_CHILD | WS_POPUP)) != WS_CHILD)
        menu = LoadMenuW( cs->hInstance, info.lpszMenuName );

    cbtc.lpcs = cs;
    hwnd = NtUserCreateWindowEx( cs->dwExStyle, &class, NULL, NULL, cs->style, cs->x, cs->y,
                                 cs->cx, cs->cy, cs->hwndParent, menu, module,
                                 cs->lpCreateParams, 0, &cbtc, 0, !unicode );
    if (!hwnd && menu && menu != cs->hMenu) NtUserDestroyMenu( menu );
    return hwnd;
}


/***********************************************************************
 *		CreateWindowExA (USER32.@)
 */
HWND WINAPI DECLSPEC_HOTPATCH CreateWindowExA( DWORD exStyle, LPCSTR className,
                                 LPCSTR windowName, DWORD style, INT x,
                                 INT y, INT width, INT height,
                                 HWND parent, HMENU menu,
                                 HINSTANCE instance, LPVOID data )
{
    CREATESTRUCTA cs;

    cs.lpCreateParams = data;
    cs.hInstance      = instance;
    cs.hMenu          = menu;
    cs.hwndParent     = parent;
    cs.x              = x;
    cs.y              = y;
    cs.cx             = width;
    cs.cy             = height;
    cs.style          = style;
    cs.lpszName       = windowName;
    cs.lpszClass      = className;
    cs.dwExStyle      = exStyle;

    if (!IS_INTRESOURCE(className))
    {
        WCHAR bufferW[256];
        if (!MultiByteToWideChar( CP_ACP, 0, className, -1, bufferW, ARRAY_SIZE( bufferW )))
            return 0;
        return wow_handlers.create_window( (CREATESTRUCTW *)&cs, bufferW, instance, FALSE );
    }
    /* Note: we rely on the fact that CREATESTRUCTA and */
    /* CREATESTRUCTW have the same layout. */
    return wow_handlers.create_window( (CREATESTRUCTW *)&cs, (LPCWSTR)className, instance, FALSE );
}


/***********************************************************************
 *		CreateWindowExW (USER32.@)
 */
HWND WINAPI DECLSPEC_HOTPATCH CreateWindowExW( DWORD exStyle, LPCWSTR className,
                                 LPCWSTR windowName, DWORD style, INT x,
                                 INT y, INT width, INT height,
                                 HWND parent, HMENU menu,
                                 HINSTANCE instance, LPVOID data )
{
    CREATESTRUCTW cs;

    cs.lpCreateParams = data;
    cs.hInstance      = instance;
    cs.hMenu          = menu;
    cs.hwndParent     = parent;
    cs.x              = x;
    cs.y              = y;
    cs.cx             = width;
    cs.cy             = height;
    cs.style          = style;
    cs.lpszName       = windowName;
    cs.lpszClass      = className;
    cs.dwExStyle      = exStyle;

    return wow_handlers.create_window( &cs, className, instance, TRUE );
}


/***********************************************************************
 *		CloseWindow (USER32.@)
 */
BOOL WINAPI CloseWindow( HWND hwnd )
{
    if (GetWindowLongW( hwnd, GWL_STYLE ) & WS_CHILD) return FALSE;
    NtUserShowWindow( hwnd, SW_MINIMIZE );
    return TRUE;
}


/***********************************************************************
 *		OpenIcon (USER32.@)
 */
BOOL WINAPI OpenIcon( HWND hwnd )
{
    if (!IsIconic( hwnd )) return FALSE;
    NtUserShowWindow( hwnd, SW_SHOWNORMAL );
    return TRUE;
}


/***********************************************************************
 *		FindWindowExW (USER32.@)
 */
HWND WINAPI FindWindowExW( HWND parent, HWND child, LPCWSTR className, LPCWSTR title )
{
    HWND *list;
    HWND retvalue = 0;
    int i = 0, len = 0;
    WCHAR *buffer = NULL;

    if (!parent && child) parent = GetDesktopWindow();
    else if (parent == HWND_MESSAGE) parent = get_hwnd_message_parent();

    if (title)
    {
        len = lstrlenW(title) + 1;  /* one extra char to check for chars beyond the end */
        if (!(buffer = HeapAlloc( GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR) ))) return 0;
    }

    if (className)
    {
        UNICODE_STRING str;
        if (IS_INTRESOURCE(className))
        {
            str.Buffer = (WCHAR *)className;
            str.Length = str.MaximumLength = 0;
        }
        else RtlInitUnicodeString( &str, className );
        list = list_window_children( 0, parent, &str, 0 );
    }
    else list = list_window_children( 0, parent, NULL, 0 );
    if (!list) goto done;

    if (child)
    {
        child = WIN_GetFullHandle( child );
        while (list[i] && list[i] != child) i++;
        if (!list[i]) goto done;
        i++;  /* start from next window */
    }

    if (title)
    {
        while (list[i])
        {
            if (NtUserInternalGetWindowText( list[i], buffer, len + 1 ))
            {
                if (!wcsicmp( buffer, title )) break;
            }
            else
            {
                if (!title[0]) break;
            }
            i++;
        }
    }
    retvalue = list[i];

 done:
    HeapFree( GetProcessHeap(), 0, list );
    HeapFree( GetProcessHeap(), 0, buffer );
    return retvalue;
}



/***********************************************************************
 *		FindWindowA (USER32.@)
 */
HWND WINAPI FindWindowA( LPCSTR className, LPCSTR title )
{
    HWND ret = FindWindowExA( 0, 0, className, title );
    if (!ret) SetLastError (ERROR_CANNOT_FIND_WND_CLASS);
    return ret;
}


/***********************************************************************
 *		FindWindowExA (USER32.@)
 */
HWND WINAPI FindWindowExA( HWND parent, HWND child, LPCSTR className, LPCSTR title )
{
    LPWSTR titleW = NULL;
    HWND hwnd = 0;

    if (title)
    {
        DWORD len = MultiByteToWideChar( CP_ACP, 0, title, -1, NULL, 0 );
        if (!(titleW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) ))) return 0;
        MultiByteToWideChar( CP_ACP, 0, title, -1, titleW, len );
    }

    if (!IS_INTRESOURCE(className))
    {
        WCHAR classW[256];
        if (MultiByteToWideChar( CP_ACP, 0, className, -1, classW, ARRAY_SIZE( classW )))
            hwnd = FindWindowExW( parent, child, classW, titleW );
    }
    else
    {
        hwnd = FindWindowExW( parent, child, (LPCWSTR)className, titleW );
    }

    HeapFree( GetProcessHeap(), 0, titleW );
    return hwnd;
}


/***********************************************************************
 *		FindWindowW (USER32.@)
 */
HWND WINAPI FindWindowW( LPCWSTR className, LPCWSTR title )
{
    return FindWindowExW( 0, 0, className, title );
}


/**********************************************************************
 *		GetDesktopWindow (USER32.@)
 */
HWND WINAPI GetDesktopWindow(void)
{
    struct user_thread_info *thread_info = get_user_thread_info();

    if (thread_info->top_window) return thread_info->top_window;
    return UlongToHandle( NtUserCallNoParam( NtUserGetDesktopWindow ));
}


/*******************************************************************
 *		EnableWindow (USER32.@)
 */
BOOL WINAPI EnableWindow( HWND hwnd, BOOL enable )
{
    BOOL retvalue;

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

    TRACE("( %p, %d )\n", hwnd, enable);

    if (enable)
    {
        retvalue = (WIN_SetStyle( hwnd, 0, WS_DISABLED ) & WS_DISABLED) != 0;
        if (retvalue) SendMessageW( hwnd, WM_ENABLE, TRUE, 0 );
    }
    else
    {
        SendMessageW( hwnd, WM_CANCELMODE, 0, 0 );

        retvalue = (WIN_SetStyle( hwnd, WS_DISABLED, 0 ) & WS_DISABLED) != 0;
        if (!retvalue)
        {
            if (hwnd == GetFocus())
                NtUserSetFocus( 0 ); /* A disabled window can't have the focus */

            SendMessageW( hwnd, WM_ENABLE, FALSE, 0 );
        }
    }
    return retvalue;
}


/***********************************************************************
 *		IsWindowEnabled (USER32.@)
 */
BOOL WINAPI IsWindowEnabled( HWND hwnd )
{
    return NtUserCallHwnd( hwnd, NtUserIsWindowEnabled );
}

/***********************************************************************
 *		IsWindowUnicode (USER32.@)
 */
BOOL WINAPI IsWindowUnicode( HWND hwnd )
{
    return NtUserCallHwnd( hwnd, NtUserIsWindowUnicode );
}


/***********************************************************************
 *		GetWindowDpiAwarenessContext  (USER32.@)
 */
DPI_AWARENESS_CONTEXT WINAPI GetWindowDpiAwarenessContext( HWND hwnd )
{
    return (DPI_AWARENESS_CONTEXT)NtUserCallHwnd( hwnd, NtUserGetWindowDpiAwarenessContext );
}


/***********************************************************************
 *              GetDpiForWindow   (USER32.@)
 */
UINT WINAPI GetDpiForWindow( HWND hwnd )
{
    return NtUserCallHwnd( hwnd, NtUserGetDpiForWindow );
}


/**********************************************************************
 *		GetWindowWord (USER32.@)
 */
WORD WINAPI GetWindowWord( HWND hwnd, INT offset )
{
    return NtUserCallHwndParam( hwnd, offset, NtUserGetWindowWord );
}


/**********************************************************************
 *		GetWindowLongA (USER32.@)
 */
LONG WINAPI GetWindowLongA( HWND hwnd, INT offset )
{
    switch (offset)
    {
#ifdef _WIN64
    case GWLP_WNDPROC:
    case GWLP_HINSTANCE:
    case GWLP_HWNDPARENT:
        WARN( "Invalid offset %d\n", offset );
        SetLastError( ERROR_INVALID_INDEX );
        return 0;
#endif
    default:
        return NtUserCallHwndParam( hwnd, offset, NtUserGetWindowLongA );
    }
}


/**********************************************************************
 *		GetWindowLongW (USER32.@)
 */
LONG WINAPI GetWindowLongW( HWND hwnd, INT offset )
{
    switch (offset)
    {
#ifdef _WIN64
    case GWLP_WNDPROC:
    case GWLP_HINSTANCE:
    case GWLP_HWNDPARENT:
        WARN( "Invalid offset %d\n", offset );
        SetLastError( ERROR_INVALID_INDEX );
        return 0;
#endif
    default:
        return NtUserCallHwndParam( hwnd, offset, NtUserGetWindowLongW );
    }
}


/**********************************************************************
 *		SetWindowLongA (USER32.@)
 *
 * See SetWindowLongW.
 */
LONG WINAPI DECLSPEC_HOTPATCH SetWindowLongA( HWND hwnd, INT offset, LONG newval )
{
    switch (offset)
    {
#ifdef _WIN64
    case GWLP_WNDPROC:
    case GWLP_HINSTANCE:
    case GWLP_HWNDPARENT:
        WARN( "Invalid offset %d\n", offset );
        SetLastError( ERROR_INVALID_INDEX );
        return 0;
#endif
    default:
        return NtUserSetWindowLong( hwnd, offset, newval, TRUE );
    }
}


/**********************************************************************
 *		SetWindowLongW (USER32.@) Set window attribute
 *
 * SetWindowLong() alters one of a window's attributes or sets a 32-bit (long)
 * value in a window's extra memory.
 *
 * The _hwnd_ parameter specifies the handle to a window that
 * has extra memory. The _newval_ parameter contains the new
 * attribute or extra memory value.  If positive, the _offset_
 * parameter is the byte-addressed location in the window's extra
 * memory to set.  If negative, _offset_ specifies the window
 * attribute to set, and should be one of the following values:
 *
 * GWL_EXSTYLE      The window's extended window style
 *
 * GWL_STYLE        The window's window style.
 *
 * GWLP_WNDPROC     Pointer to the window's window procedure.
 *
 * GWLP_HINSTANCE   The window's application instance handle.
 *
 * GWLP_ID          The window's identifier.
 *
 * GWLP_USERDATA    The window's user-specified data.
 *
 * If the window is a dialog box, the _offset_ parameter can be one of
 * the following values:
 *
 * DWLP_DLGPROC     The address of the window's dialog box procedure.
 *
 * DWLP_MSGRESULT   The return value of a message
 *                  that the dialog box procedure processed.
 *
 * DWLP_USER        Application specific information.
 *
 * RETURNS
 *
 * If successful, returns the previous value located at _offset_. Otherwise,
 * returns 0.
 *
 * NOTES
 *
 * Extra memory for a window class is specified by a nonzero cbWndExtra
 * parameter of the WNDCLASS structure passed to RegisterClass() at the
 * time of class creation.
 *
 * Using GWL_WNDPROC to set a new window procedure effectively creates
 * a window subclass. Use CallWindowProc() in the new windows procedure
 * to pass messages to the superclass's window procedure.
 *
 * The user data is reserved for use by the application which created
 * the window.
 *
 * Do not use GWL_STYLE to change the window's WS_DISABLED style;
 * instead, call the EnableWindow() function to change the window's
 * disabled state.
 *
 * Do not use GWL_HWNDPARENT to reset the window's parent, use
 * SetParent() instead.
 *
 * Win95:
 * When offset is GWL_STYLE and the calling app's ver is 4.0,
 * it sends WM_STYLECHANGING before changing the settings
 * and WM_STYLECHANGED afterwards.
 * App ver 4.0 can't use SetWindowLong to change WS_EX_TOPMOST.
 */
LONG WINAPI DECLSPEC_HOTPATCH SetWindowLongW(
    HWND hwnd,  /* [in] window to alter */
    INT offset, /* [in] offset, in bytes, of location to alter */
    LONG newval /* [in] new value of location */
)
{
    switch (offset)
    {
#ifdef _WIN64
    case GWLP_WNDPROC:
    case GWLP_HINSTANCE:
    case GWLP_HWNDPARENT:
        WARN("Invalid offset %d\n", offset );
        SetLastError( ERROR_INVALID_INDEX );
        return 0;
#endif
    default:
        return NtUserSetWindowLong( hwnd, offset, newval, FALSE );
    }
}


/*******************************************************************
 *		GetWindowTextA (USER32.@)
 */
INT WINAPI GetWindowTextA( HWND hwnd, LPSTR lpString, INT nMaxCount )
{
    WCHAR *buffer;
    int ret = 0;

    if (!lpString || nMaxCount <= 0) return 0;

    __TRY
    {
        lpString[0] = 0;

        if (WIN_IsCurrentProcess( hwnd ))
        {
            ret = (INT)SendMessageA( hwnd, WM_GETTEXT, nMaxCount, (LPARAM)lpString );
        }
        else if ((buffer = HeapAlloc( GetProcessHeap(), 0, nMaxCount * sizeof(WCHAR) )))
        {
            /* when window belongs to other process, don't send a message */
            NtUserInternalGetWindowText( hwnd, buffer, nMaxCount );
            if (!WideCharToMultiByte( CP_ACP, 0, buffer, -1, lpString, nMaxCount, NULL, NULL ))
                lpString[nMaxCount-1] = 0;
            HeapFree( GetProcessHeap(), 0, buffer );
            ret = strlen(lpString);
        }
    }
    __EXCEPT_PAGE_FAULT
    {
        ret = 0;
    }
    __ENDTRY

    return ret;
}


/*******************************************************************
 *		GetWindowTextW (USER32.@)
 */
INT WINAPI GetWindowTextW( HWND hwnd, LPWSTR lpString, INT nMaxCount )
{
    int ret;

    if (!lpString || nMaxCount <= 0) return 0;

    __TRY
    {
        lpString[0] = 0;

        if (WIN_IsCurrentProcess( hwnd ))
        {
            ret = (INT)SendMessageW( hwnd, WM_GETTEXT, nMaxCount, (LPARAM)lpString );
        }
        else
        {
            /* when window belongs to other process, don't send a message */
            ret = NtUserInternalGetWindowText( hwnd, lpString, nMaxCount );
        }
    }
    __EXCEPT_PAGE_FAULT
    {
        ret = 0;
    }
    __ENDTRY

    return ret;
}


/*******************************************************************
 *		SetWindowTextA (USER32.@)
 *		SetWindowText  (USER32.@)
 */
BOOL WINAPI DECLSPEC_HOTPATCH SetWindowTextA( HWND hwnd, LPCSTR lpString )
{
    if (is_broadcast(hwnd))
    {
        SetLastError( ERROR_INVALID_PARAMETER );
        return FALSE;
    }
    if (!WIN_IsCurrentProcess( hwnd ))
        WARN( "setting text %s of other process window %p should not use SendMessage\n",
               debugstr_a(lpString), hwnd );
    return (BOOL)SendMessageA( hwnd, WM_SETTEXT, 0, (LPARAM)lpString );
}


/*******************************************************************
 *		SetWindowTextW (USER32.@)
 */
BOOL WINAPI DECLSPEC_HOTPATCH SetWindowTextW( HWND hwnd, LPCWSTR lpString )
{
    if (is_broadcast(hwnd))
    {
        SetLastError( ERROR_INVALID_PARAMETER );
        return FALSE;
    }
    if (!WIN_IsCurrentProcess( hwnd ))
        WARN( "setting text %s of other process window %p should not use SendMessage\n",
               debugstr_w(lpString), hwnd );
    return (BOOL)SendMessageW( hwnd, WM_SETTEXT, 0, (LPARAM)lpString );
}


/*******************************************************************
 *		GetWindowTextLengthA (USER32.@)
 */
INT WINAPI GetWindowTextLengthA( HWND hwnd )
{
    CPINFO info;

    if (WIN_IsCurrentProcess( hwnd )) return SendMessageA( hwnd, WM_GETTEXTLENGTH, 0, 0 );

    /* when window belongs to other process, don't send a message */
    GetCPInfo( CP_ACP, &info );
    return NtUserCallHwnd( hwnd, NtUserGetWindowTextLength ) * info.MaxCharSize;
}

/*******************************************************************
 *		GetWindowTextLengthW (USER32.@)
 */
INT WINAPI GetWindowTextLengthW( HWND hwnd )
{
    if (WIN_IsCurrentProcess( hwnd )) return SendMessageW( hwnd, WM_GETTEXTLENGTH, 0, 0 );

    /* when window belongs to other process, don't send a message */
    return NtUserCallHwnd( hwnd, NtUserGetWindowTextLength );
}


/*******************************************************************
 *		IsWindow (USER32.@)
 */
BOOL WINAPI IsWindow( HWND hwnd )
{
    return NtUserCallHwnd( hwnd, NtUserIsWindow );
}


/***********************************************************************
 *		GetWindowThreadProcessId (USER32.@)
 */
DWORD WINAPI GetWindowThreadProcessId( HWND hwnd, LPDWORD process )
{
    return NtUserCallHwndParam( hwnd, (UINT_PTR)process, NtUserGetWindowThread );
}


/*****************************************************************
 *		GetParent (USER32.@)
 */
HWND WINAPI GetParent( HWND hwnd )
{
    return UlongToHandle( NtUserCallHwnd( hwnd, NtUserGetParent ));
}


/*******************************************************************
 *		IsChild (USER32.@)
 */
BOOL WINAPI IsChild( HWND parent, HWND child )
{
    return NtUserCallHwndParam( parent, HandleToUlong(child), NtUserIsChild );
}


/***********************************************************************
 *		IsWindowVisible (USER32.@)
 */
BOOL WINAPI IsWindowVisible( HWND hwnd )
{
    return NtUserCallHwnd( hwnd, NtUserIsWindowVisible );
}


/***********************************************************************
 *           WIN_IsWindowDrawable
 *
 * 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.
 */
BOOL WIN_IsWindowDrawable( HWND hwnd, BOOL icon )
{
    /* FIXME: move callers to win32u */
    return NtUserCallHwndParam( hwnd, icon, NtUserIsWindowDrawable );
}


/*******************************************************************
 *		GetTopWindow (USER32.@)
 */
HWND WINAPI GetTopWindow( HWND hwnd )
{
    if (!hwnd) hwnd = GetDesktopWindow();
    return GetWindow( hwnd, GW_CHILD );
}


/*******************************************************************
 *		GetWindow (USER32.@)
 */
HWND WINAPI GetWindow( HWND hwnd, UINT rel )
{
    return UlongToHandle( NtUserCallHwndParam( hwnd, rel, NtUserGetWindowRelative ));
}


/*******************************************************************
 *		ShowOwnedPopups (USER32.@)
 */
BOOL WINAPI ShowOwnedPopups( HWND owner, BOOL fShow )
{
    int count = 0;
    HWND *win_array = WIN_ListChildren( GetDesktopWindow() );

    if (!win_array) return TRUE;

    while (win_array[count]) count++;
    while (--count >= 0)
    {
        if (GetWindow( win_array[count], GW_OWNER ) != owner) continue;
        if (fShow)
        {
            if (win_get_flags( win_array[count] ) & WIN_NEEDS_SHOW_OWNEDPOPUP)
                /* In Windows, ShowOwnedPopups(TRUE) generates
                 * WM_SHOWWINDOW messages with SW_PARENTOPENING,
                 * regardless of the state of the owner
                 */
                SendMessageW(win_array[count], WM_SHOWWINDOW, SW_SHOWNORMAL, SW_PARENTOPENING);
        }
        else
        {
            if (GetWindowLongW( win_array[count], GWL_STYLE ) & WS_VISIBLE)
                /* In Windows, ShowOwnedPopups(FALSE) generates
                 * WM_SHOWWINDOW messages with SW_PARENTCLOSING,
                 * regardless of the state of the owner
                 */
                SendMessageW(win_array[count], WM_SHOWWINDOW, SW_HIDE, SW_PARENTCLOSING);
        }
    }
    HeapFree( GetProcessHeap(), 0, win_array );
    return TRUE;
}


/*******************************************************************
 *		GetLastActivePopup (USER32.@)
 */
HWND WINAPI GetLastActivePopup( HWND hwnd )
{
    HWND retval = hwnd;

    SERVER_START_REQ( get_window_info )
    {
        req->handle = wine_server_user_handle( hwnd );
        if (!wine_server_call_err( req )) retval = wine_server_ptr_handle( reply->last_active );
    }
    SERVER_END_REQ;
    return retval;
}


/*******************************************************************
 *           WIN_ListChildren
 *
 * 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 *WIN_ListChildren( HWND hwnd )
{
    if (!hwnd)
    {
        SetLastError( ERROR_INVALID_WINDOW_HANDLE );
        return NULL;
    }
    return list_window_children( 0, hwnd, NULL, 0 );
}


/*******************************************************************
 *		EnumWindows (USER32.@)
 */
BOOL WINAPI EnumWindows( WNDENUMPROC lpEnumFunc, LPARAM lParam )
{
    HWND *list;
    BOOL ret = TRUE;
    int i;

    USER_CheckNotLock();

    /* We have to build a list of all windows first, to avoid */
    /* unpleasant side-effects, for instance if the callback */
    /* function changes the Z-order of the windows.          */

    if (!(list = WIN_ListChildren( GetDesktopWindow() ))) return TRUE;

    /* Now call the callback function for every window */

    for (i = 0; list[i]; i++)
    {
        /* Make sure that the window still exists */
        if (!IsWindow( list[i] )) continue;
        if (!(ret = lpEnumFunc( list[i], lParam ))) break;
    }
    HeapFree( GetProcessHeap(), 0, list );
    return ret;
}


/**********************************************************************
 *		EnumThreadWindows (USER32.@)
 */
BOOL WINAPI EnumThreadWindows( DWORD id, WNDENUMPROC func, LPARAM lParam )
{
    HWND *list;
    int i;
    BOOL ret = TRUE;

    USER_CheckNotLock();

    if (!(list = list_window_children( 0, GetDesktopWindow(), NULL, id ))) return TRUE;

    /* Now call the callback function for every window */

    for (i = 0; list[i]; i++)
        if (!(ret = func( list[i], lParam ))) break;
    HeapFree( GetProcessHeap(), 0, list );
    return ret;
}


/***********************************************************************
 *              EnumDesktopWindows   (USER32.@)
 */
BOOL WINAPI EnumDesktopWindows( HDESK desktop, WNDENUMPROC func, LPARAM lparam )
{
    HWND *list;
    int i;

    USER_CheckNotLock();

    if (!(list = list_window_children( desktop, 0, NULL, 0 ))) return TRUE;

    for (i = 0; list[i]; i++)
        if (!func( list[i], lparam )) break;
    HeapFree( GetProcessHeap(), 0, list );
    return TRUE;
}


#ifdef __i386__
/* Some apps pass a non-stdcall proc to EnumChildWindows,
 * so we need a small assembly wrapper to call the proc.
 */
extern LRESULT enum_callback_wrapper( WNDENUMPROC proc, HWND hwnd, LPARAM lparam );
__ASM_GLOBAL_FUNC( enum_callback_wrapper,
    "pushl %ebp\n\t"
    __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
    __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
    "movl %esp,%ebp\n\t"
    __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
    "pushl 16(%ebp)\n\t"
    "pushl 12(%ebp)\n\t"
    "call *8(%ebp)\n\t"
    "leave\n\t"
    __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
    __ASM_CFI(".cfi_same_value %ebp\n\t")
    "ret" )
#else
static inline LRESULT enum_callback_wrapper( WNDENUMPROC proc, HWND hwnd, LPARAM lparam )
{
    return proc( hwnd, lparam );
}
#endif /* __i386__ */

/**********************************************************************
 *           WIN_EnumChildWindows
 *
 * Helper function for EnumChildWindows().
 */
static BOOL WIN_EnumChildWindows( HWND *list, WNDENUMPROC func, LPARAM lParam )
{
    HWND *childList;
    BOOL ret = FALSE;

    for ( ; *list; list++)
    {
        /* Make sure that the window still exists */
        if (!IsWindow( *list )) continue;
        /* Build children list first */
        childList = WIN_ListChildren( *list );

        ret = enum_callback_wrapper( func, *list, lParam );

        if (childList)
        {
            if (ret) ret = WIN_EnumChildWindows( childList, func, lParam );
            HeapFree( GetProcessHeap(), 0, childList );
        }
        if (!ret) return FALSE;
    }
    return TRUE;
}


/**********************************************************************
 *		EnumChildWindows (USER32.@)
 */
BOOL WINAPI EnumChildWindows( HWND parent, WNDENUMPROC func, LPARAM lParam )
{
    HWND *list;
    BOOL ret;

    USER_CheckNotLock();

    if (!(list = WIN_ListChildren( parent ))) return FALSE;
    ret = WIN_EnumChildWindows( list, func, lParam );
    HeapFree( GetProcessHeap(), 0, list );
    return ret;
}


/*******************************************************************
 *		AnyPopup (USER32.@)
 */
BOOL WINAPI AnyPopup(void)
{
    int i;
    BOOL retvalue;
    HWND *list = WIN_ListChildren( GetDesktopWindow() );

    if (!list) return FALSE;
    for (i = 0; list[i]; i++)
    {
        if (IsWindowVisible( list[i] ) && GetWindow( list[i], GW_OWNER )) break;
    }
    retvalue = (list[i] != 0);
    HeapFree( GetProcessHeap(), 0, list );
    return retvalue;
}


/*******************************************************************
 *		FlashWindow (USER32.@)
 */
BOOL WINAPI FlashWindow( HWND hWnd, BOOL bInvert )
{
    FLASHWINFO finfo;

    finfo.cbSize = sizeof(FLASHWINFO);
    finfo.dwFlags = bInvert ? FLASHW_ALL : FLASHW_STOP;
    finfo.uCount = 1;
    finfo.dwTimeout = 0;
    finfo.hwnd = hWnd;
    return NtUserFlashWindowEx( &finfo );
}


/*******************************************************************
 *		GetWindowContextHelpId (USER32.@)
 */
DWORD WINAPI GetWindowContextHelpId( HWND hwnd )
{
    return NtUserCallHwnd( hwnd, NtUserGetWindowContextHelpId );
}


/*******************************************************************
 *		SetWindowContextHelpId (USER32.@)
 */
BOOL WINAPI SetWindowContextHelpId( HWND hwnd, DWORD id )
{
    WND *wnd = WIN_GetPtr( hwnd );
    if (!wnd || wnd == WND_DESKTOP) return FALSE;
    if (wnd == WND_OTHER_PROCESS)
    {
        if (IsWindow( hwnd )) FIXME( "not supported on other process window %p\n", hwnd );
        return FALSE;
    }
    wnd->helpContext = id;
    WIN_ReleasePtr( wnd );
    return TRUE;
}


/*******************************************************************
 *		DragDetect (USER32.@)
 */
BOOL WINAPI DragDetect( HWND hWnd, POINT pt )
{
    MSG msg;
    RECT rect;
    WORD wDragWidth, wDragHeight;

    TRACE( "%p,%s\n", hWnd, wine_dbgstr_point( &pt ) );

    if (!(NtUserGetKeyState( VK_LBUTTON ) & 0x8000))
        return FALSE;

    wDragWidth = GetSystemMetrics(SM_CXDRAG);
    wDragHeight= GetSystemMetrics(SM_CYDRAG);
    SetRect(&rect, pt.x - wDragWidth, pt.y - wDragHeight, pt.x + wDragWidth, pt.y + wDragHeight);

    NtUserSetCapture( hWnd );

    while(1)
    {
        while (PeekMessageW( &msg, 0, WM_MOUSEFIRST, WM_MOUSELAST, PM_REMOVE ))
        {
            if( msg.message == WM_LBUTTONUP )
            {
                ReleaseCapture();
                return FALSE;
            }
            if( msg.message == WM_MOUSEMOVE )
            {
                POINT tmp;
                tmp.x = (short)LOWORD(msg.lParam);
                tmp.y = (short)HIWORD(msg.lParam);
                if( !PtInRect( &rect, tmp ))
                {
                    ReleaseCapture();
                    return TRUE;
                }
            }
        }
        WaitMessage();
    }
    return FALSE;
}

/******************************************************************************
 *		GetWindowModuleFileNameA (USER32.@)
 */
UINT WINAPI GetWindowModuleFileNameA( HWND hwnd, LPSTR module, UINT size )
{
    WND *win;
    HINSTANCE hinst;

    TRACE( "%p, %p, %u\n", hwnd, module, size );

    win = WIN_GetPtr( hwnd );
    if (!win || win == WND_OTHER_PROCESS || win == WND_DESKTOP)
    {
        SetLastError( ERROR_INVALID_WINDOW_HANDLE );
        return 0;
    }
    hinst = win->hInstance;
    WIN_ReleasePtr( win );

    return GetModuleFileNameA( hinst, module, size );
}

/******************************************************************************
 *		GetWindowModuleFileNameW (USER32.@)
 */
UINT WINAPI GetWindowModuleFileNameW( HWND hwnd, LPWSTR module, UINT size )
{
    WND *win;
    HINSTANCE hinst;

    TRACE( "%p, %p, %u\n", hwnd, module, size );

    win = WIN_GetPtr( hwnd );
    if (!win || win == WND_OTHER_PROCESS || win == WND_DESKTOP)
    {
        SetLastError( ERROR_INVALID_WINDOW_HANDLE );
        return 0;
    }
    hinst = win->hInstance;
    WIN_ReleasePtr( win );

    return GetModuleFileNameW( hinst, module, size );
}

/******************************************************************************
 *              GetWindowInfo (USER32.@)
 *
 * Note: tests show that Windows doesn't check cbSize of the structure.
 */
BOOL WINAPI DECLSPEC_HOTPATCH GetWindowInfo( HWND hwnd, WINDOWINFO *info )
{
    return NtUserCallHwndParam( hwnd, (UINT_PTR)info, NtUserGetWindowInfo );
}

/******************************************************************************
 *              SwitchDesktop (USER32.@)
 *
 * NOTES: Sets the current input or interactive desktop.
 */
BOOL WINAPI SwitchDesktop( HDESK hDesktop)
{
    FIXME("(hwnd %p) stub!\n", hDesktop);
    return TRUE;
}


/***********************************************************************
 *           __wine_set_pixel_format
 */
BOOL CDECL __wine_set_pixel_format( HWND hwnd, int format )
{
    return NtUserCallHwndParam( hwnd, format, NtUserSetWindowPixelFormat );
}


/*****************************************************************************
 *              UpdateLayeredWindowIndirect  (USER32.@)
 */
BOOL WINAPI UpdateLayeredWindowIndirect( HWND hwnd, const UPDATELAYEREDWINDOWINFO *info )
{
    if (!info || info->cbSize != sizeof(*info))
    {
        SetLastError( ERROR_INVALID_PARAMETER );
        return FALSE;
    }

    return NtUserUpdateLayeredWindow( hwnd, info->hdcDst, info->pptDst, info->psize,
                                      info->hdcSrc, info->pptSrc, info->crKey,
                                      info->pblend, info->dwFlags, info->prcDirty );
}


/*****************************************************************************
 *              UpdateLayeredWindow (USER32.@)
 */
BOOL WINAPI UpdateLayeredWindow( HWND hwnd, HDC hdcDst, POINT *pptDst, SIZE *psize,
                                 HDC hdcSrc, POINT *pptSrc, COLORREF crKey, BLENDFUNCTION *pblend,
                                 DWORD flags)
{
    UPDATELAYEREDWINDOWINFO info;

    if (flags & ULW_EX_NORESIZE)  /* only valid for UpdateLayeredWindowIndirect */
    {
        SetLastError( ERROR_INVALID_PARAMETER );
        return FALSE;
    }
    info.cbSize   = sizeof(info);
    info.hdcDst   = hdcDst;
    info.pptDst   = pptDst;
    info.psize    = psize;
    info.hdcSrc   = hdcSrc;
    info.pptSrc   = pptSrc;
    info.crKey    = crKey;
    info.pblend   = pblend;
    info.dwFlags  = flags;
    info.prcDirty = NULL;
    return UpdateLayeredWindowIndirect( hwnd, &info );
}


/******************************************************************************
 *                    GetProcessDefaultLayout [USER32.@]
 *
 * Gets the default layout for parentless windows.
 */
BOOL WINAPI GetProcessDefaultLayout( DWORD *layout )
{
    if (!layout)
    {
        SetLastError( ERROR_NOACCESS );
        return FALSE;
    }
    if (process_layout == ~0u)
    {
        WCHAR *str, buffer[MAX_PATH];
        DWORD i, version_layout = 0;
        UINT len;
        DWORD user_lang = GetUserDefaultLangID();
        DWORD *languages;
        void *data = NULL;

        GetModuleFileNameW( 0, buffer, MAX_PATH );
        if (!(len = GetFileVersionInfoSizeW( buffer, NULL ))) goto done;
        if (!(data = HeapAlloc( GetProcessHeap(), 0, len ))) goto done;
        if (!GetFileVersionInfoW( buffer, 0, len, data )) goto done;
        if (!VerQueryValueW( data, L"\\VarFileInfo\\Translation", (void **)&languages, &len ) || !len) goto done;

        len /= sizeof(DWORD);
        for (i = 0; i < len; i++) if (LOWORD(languages[i]) == user_lang) break;
        if (i == len)  /* try neutral language */
            for (i = 0; i < len; i++)
                if (LOWORD(languages[i]) == MAKELANGID( PRIMARYLANGID(user_lang), SUBLANG_NEUTRAL )) break;
        if (i == len) i = 0;  /* default to the first one */

        swprintf( buffer, ARRAY_SIZE(buffer), L"\\StringFileInfo\\%04x%04x\\FileDescription",
                  LOWORD(languages[i]), HIWORD(languages[i]) );
        if (!VerQueryValueW( data, buffer, (void **)&str, &len )) goto done;
        TRACE( "found description %s\n", debugstr_w( str ));
        if (str[0] == 0x200e && str[1] == 0x200e) version_layout = LAYOUT_RTL;

    done:
        HeapFree( GetProcessHeap(), 0, data );
        process_layout = version_layout;
    }
    *layout = process_layout;
    return TRUE;
}


/******************************************************************************
 *                    SetProcessDefaultLayout [USER32.@]
 *
 * Sets the default layout for parentless windows.
 */
BOOL WINAPI SetProcessDefaultLayout( DWORD layout )
{
    process_layout = layout;
    return TRUE;
}

#ifdef _WIN64

/* 64bit versions */

#undef GetWindowLongPtrW
#undef GetWindowLongPtrA
#undef SetWindowLongPtrW
#undef SetWindowLongPtrA

/*****************************************************************************
 *              GetWindowLongPtrW (USER32.@)
 */
LONG_PTR WINAPI GetWindowLongPtrW( HWND hwnd, INT offset )
{
    return NtUserCallHwndParam( hwnd, offset, NtUserGetWindowLongPtrW );
}

/*****************************************************************************
 *              GetWindowLongPtrA (USER32.@)
 */
LONG_PTR WINAPI GetWindowLongPtrA( HWND hwnd, INT offset )
{
    return NtUserCallHwndParam( hwnd, offset, NtUserGetWindowLongPtrA );
}

/*****************************************************************************
 *              SetWindowLongPtrW (USER32.@)
 */
LONG_PTR WINAPI SetWindowLongPtrW( HWND hwnd, INT offset, LONG_PTR newval )
{
    return NtUserSetWindowLongPtr( hwnd, offset, newval, FALSE );
}

/*****************************************************************************
 *              SetWindowLongPtrA (USER32.@)
 */
LONG_PTR WINAPI SetWindowLongPtrA( HWND hwnd, INT offset, LONG_PTR newval )
{
    return NtUserSetWindowLongPtr( hwnd, offset, newval, TRUE );
}

#endif /* _WIN64 */

/*****************************************************************************
 *              RegisterTouchWindow (USER32.@)
 */
BOOL WINAPI RegisterTouchWindow(HWND hwnd, ULONG flags)
{
    FIXME("(%p %08x): stub\n", hwnd, flags);
    SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
    return FALSE;
}

/*****************************************************************************
 *              UnregisterTouchWindow (USER32.@)
 */
BOOL WINAPI UnregisterTouchWindow(HWND hwnd)
{
    FIXME("(%p): stub\n", hwnd);
    SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
    return FALSE;
}

/*****************************************************************************
 *              CloseTouchInputHandle (USER32.@)
 */
BOOL WINAPI CloseTouchInputHandle(HTOUCHINPUT handle)
{
    FIXME("(%p): stub\n", handle);
    SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
    return FALSE;
}

/*****************************************************************************
 *              GetTouchInputInfo (USER32.@)
 */
BOOL WINAPI GetTouchInputInfo(HTOUCHINPUT handle, UINT count, TOUCHINPUT *ptr, int size)
{
    FIXME("(%p %u %p %u): stub\n", handle, count, ptr, size);
    SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
    return FALSE;
}

/*****************************************************************************
 *              GetGestureInfo (USER32.@)
 */
BOOL WINAPI GetGestureInfo(HGESTUREINFO handle, PGESTUREINFO ptr)
{
    FIXME("(%p %p): stub\n", handle, ptr);
    SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
    return FALSE;
}

/*****************************************************************************
 *              GetWindowDisplayAffinity (USER32.@)
 */
BOOL WINAPI GetWindowDisplayAffinity(HWND hwnd, DWORD *affinity)
{
    FIXME("(%p, %p): stub\n", hwnd, affinity);

    if (!hwnd || !affinity)
    {
        SetLastError(hwnd ? ERROR_NOACCESS : ERROR_INVALID_WINDOW_HANDLE);
        return FALSE;
    }

    *affinity = WDA_NONE;
    return TRUE;
}

/*****************************************************************************
 *              SetWindowDisplayAffinity (USER32.@)
 */
BOOL WINAPI SetWindowDisplayAffinity(HWND hwnd, DWORD affinity)
{
    FIXME("(%p, %u): stub\n", hwnd, affinity);

    if (!hwnd)
    {
        SetLastError(ERROR_INVALID_WINDOW_HANDLE);
        return FALSE;
    }

    SetLastError(ERROR_NOT_ENOUGH_MEMORY);
    return FALSE;
}

/**********************************************************************
 *              SetWindowCompositionAttribute (USER32.@)
 */
BOOL WINAPI SetWindowCompositionAttribute(HWND hwnd, void *data)
{
    FIXME("(%p, %p): stub\n", hwnd, data);
    SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
    return FALSE;
}

/***********************************************************************
 *              InternalGetWindowIcon   (USER32.@)
 */
HICON WINAPI InternalGetWindowIcon( HWND hwnd, UINT type )
{
    WND *win = WIN_GetPtr( hwnd );
    HICON ret;

    TRACE( "hwnd %p, type %#x\n", hwnd, type );

    if (!win)
    {
        SetLastError( ERROR_INVALID_WINDOW_HANDLE );
        return 0;
    }
    if (win == WND_OTHER_PROCESS || win == WND_DESKTOP)
    {
        if (IsWindow( hwnd )) FIXME( "not supported on other process window %p\n", hwnd );
        return 0;
    }

    switch (type)
    {
        case ICON_BIG:
            ret = win->hIcon;
            if (!ret) ret = (HICON)GetClassLongPtrW( hwnd, GCLP_HICON );
            break;

        case ICON_SMALL:
        case ICON_SMALL2:
            ret = win->hIconSmall ? win->hIconSmall : win->hIconSmall2;
            if (!ret) ret = (HICON)GetClassLongPtrW( hwnd, GCLP_HICONSM );
            if (!ret) ret = (HICON)GetClassLongPtrW( hwnd, GCLP_HICON );
            break;

        default:
            SetLastError( ERROR_INVALID_PARAMETER );
            WIN_ReleasePtr( win );
            return 0;
    }

    if (!ret) ret = LoadIconW( 0, (const WCHAR *)IDI_APPLICATION );

    WIN_ReleasePtr( win );
    return CopyIcon( ret );
}