diff --git a/dlls/gdi32/objects.c b/dlls/gdi32/objects.c
index 88b36f279a3..42bf6fcf111 100644
--- a/dlls/gdi32/objects.c
+++ b/dlls/gdi32/objects.c
@@ -695,7 +695,7 @@ HRGN WINAPI CreatePolygonRgn( const POINT *points, INT count, INT mode )
  */
 BOOL WINAPI MirrorRgn( HWND hwnd, HRGN hrgn )
 {
-    return NtUserCallHwndParam( hwnd, HandleToUlong(hrgn), NtUserMirrorRgn );
+    return NtUserMirrorRgn( hwnd, hrgn );
 }
 
 /***********************************************************************
diff --git a/dlls/user32/class.c b/dlls/user32/class.c
index 150226eb627..aaa8f75bebe 100644
--- a/dlls/user32/class.c
+++ b/dlls/user32/class.c
@@ -493,7 +493,7 @@ BOOL WINAPI UnregisterClassW( LPCWSTR className, HINSTANCE hInstance )
  */
 WORD WINAPI GetClassWord( HWND hwnd, INT offset )
 {
-    return NtUserCallHwndParam( hwnd, offset, NtUserGetClassWord );
+    return NtUserGetClassWord( hwnd, offset );
 }
 
 
@@ -502,7 +502,7 @@ WORD WINAPI GetClassWord( HWND hwnd, INT offset )
  */
 DWORD WINAPI GetClassLongW( HWND hwnd, INT offset )
 {
-    return NtUserCallHwndParam( hwnd, offset, NtUserGetClassLongW );
+    return NtUserGetClassLongW( hwnd, offset );
 }
 
 
@@ -512,7 +512,7 @@ DWORD WINAPI GetClassLongW( HWND hwnd, INT offset )
  */
 DWORD WINAPI GetClassLongA( HWND hwnd, INT offset )
 {
-    return NtUserCallHwndParam( hwnd, offset, NtUserGetClassLongA );
+    return NtUserGetClassLongA( hwnd, offset );
 }
 
 
@@ -777,7 +777,7 @@ BOOL16 WINAPI ClassNext16( CLASSENTRY *pClassEntry )
  */
 ULONG_PTR WINAPI GetClassLongPtrA( HWND hwnd, INT offset )
 {
-    return NtUserCallHwndParam( hwnd, offset, NtUserGetClassLongPtrA );
+    return NtUserGetClassLongPtrA( hwnd, offset );
 }
 
 /***********************************************************************
@@ -785,7 +785,7 @@ ULONG_PTR WINAPI GetClassLongPtrA( HWND hwnd, INT offset )
  */
 ULONG_PTR WINAPI GetClassLongPtrW( HWND hwnd, INT offset )
 {
-    return NtUserCallHwndParam( hwnd, offset, NtUserGetClassLongPtrW );
+    return NtUserGetClassLongPtrW( hwnd, offset );
 }
 
 /***********************************************************************
diff --git a/dlls/user32/focus.c b/dlls/user32/focus.c
index ff41cf716a1..c494adce5a6 100644
--- a/dlls/user32/focus.c
+++ b/dlls/user32/focus.c
@@ -39,7 +39,7 @@
  */
 BOOL FOCUS_MouseActivate( HWND hwnd )
 {
-    return NtUserCallHwndParam( hwnd, TRUE, NtUserSetForegroundWindow );
+    return NtUserSetForegroundWindow( hwnd, TRUE );
 }
 
 
@@ -48,7 +48,7 @@ BOOL FOCUS_MouseActivate( HWND hwnd )
  */
 BOOL WINAPI SetForegroundWindow( HWND hwnd )
 {
-    return NtUserCallHwndParam( hwnd, FALSE, NtUserSetForegroundWindow );
+    return NtUserSetForegroundWindow( hwnd, FALSE );
 }
 
 
diff --git a/dlls/user32/message.c b/dlls/user32/message.c
index d2ab94dbf37..51f183fdbc0 100644
--- a/dlls/user32/message.c
+++ b/dlls/user32/message.c
@@ -1318,7 +1318,7 @@ UINT_PTR WINAPI SetTimer( HWND hwnd, UINT_PTR id, UINT timeout, TIMERPROC proc )
  */
 BOOL WINAPI KillSystemTimer( HWND hwnd, UINT_PTR id )
 {
-    return NtUserCallHwndParam( hwnd, id, NtUserKillSystemTimer );
+    return NtUserKillSystemTimer( hwnd, id );
 }
 
 
diff --git a/dlls/user32/sysparams.c b/dlls/user32/sysparams.c
index c2b570b6119..c42b6c77b0c 100644
--- a/dlls/user32/sysparams.c
+++ b/dlls/user32/sysparams.c
@@ -1013,7 +1013,7 @@ HMONITOR WINAPI MonitorFromPoint( POINT pt, DWORD flags )
  */
 HMONITOR WINAPI MonitorFromWindow( HWND hwnd, DWORD flags )
 {
-    return UlongToHandle( NtUserCallHwndParam(  hwnd, flags, NtUserMonitorFromWindow ));
+    return NtUserMonitorFromWindow( hwnd, flags );
 }
 
 /***********************************************************************
diff --git a/dlls/user32/win.c b/dlls/user32/win.c
index 5223c776d5f..de0dc2f2fb7 100644
--- a/dlls/user32/win.c
+++ b/dlls/user32/win.c
@@ -941,7 +941,7 @@ UINT WINAPI GetDpiForWindow( HWND hwnd )
  */
 WORD WINAPI GetWindowWord( HWND hwnd, INT offset )
 {
-    return NtUserCallHwndParam( hwnd, offset, NtUserGetWindowWord );
+    return NtUserGetWindowWord( hwnd, offset );
 }
 
 
@@ -961,7 +961,7 @@ LONG WINAPI GetWindowLongA( HWND hwnd, INT offset )
         return 0;
 #endif
     default:
-        return NtUserCallHwndParam( hwnd, offset, NtUserGetWindowLongA );
+        return NtUserGetWindowLongA( hwnd, offset );
     }
 }
 
@@ -982,7 +982,7 @@ LONG WINAPI GetWindowLongW( HWND hwnd, INT offset )
         return 0;
 #endif
     default:
-        return NtUserCallHwndParam( hwnd, offset, NtUserGetWindowLongW );
+        return NtUserGetWindowLongW( hwnd, offset );
     }
 }
 
@@ -1244,7 +1244,7 @@ BOOL WINAPI IsWindow( HWND hwnd )
  */
 DWORD WINAPI GetWindowThreadProcessId( HWND hwnd, LPDWORD process )
 {
-    return NtUserCallHwndParam( hwnd, (UINT_PTR)process, NtUserGetWindowThread );
+    return NtUserGetWindowThread( hwnd, process );
 }
 
 
@@ -1262,7 +1262,7 @@ HWND WINAPI GetParent( HWND hwnd )
  */
 BOOL WINAPI IsChild( HWND parent, HWND child )
 {
-    return NtUserCallHwndParam( parent, HandleToUlong(child), NtUserIsChild );
+    return NtUserIsChild( parent, child );
 }
 
 
@@ -1304,7 +1304,7 @@ HWND WINAPI GetTopWindow( HWND hwnd )
  */
 HWND WINAPI GetWindow( HWND hwnd, UINT rel )
 {
-    return UlongToHandle( NtUserCallHwndParam( hwnd, rel, NtUserGetWindowRelative ));
+    return NtUserGetWindowRelative( hwnd, rel );
 }
 
 
@@ -1683,7 +1683,7 @@ UINT WINAPI GetWindowModuleFileNameW( HWND hwnd, LPWSTR module, UINT size )
  */
 BOOL WINAPI DECLSPEC_HOTPATCH GetWindowInfo( HWND hwnd, WINDOWINFO *info )
 {
-    return NtUserCallHwndParam( hwnd, (UINT_PTR)info, NtUserGetWindowInfo );
+    return NtUserGetWindowInfo( hwnd, info );
 }
 
 /******************************************************************************
@@ -1703,7 +1703,7 @@ BOOL WINAPI SwitchDesktop( HDESK hDesktop)
  */
 BOOL CDECL __wine_set_pixel_format( HWND hwnd, int format )
 {
-    return NtUserCallHwndParam( hwnd, format, NtUserSetWindowPixelFormat );
+    return NtUserSetWindowPixelFormat( hwnd, format );
 }
 
 
@@ -1826,7 +1826,7 @@ BOOL WINAPI SetProcessDefaultLayout( DWORD layout )
  */
 LONG_PTR WINAPI GetWindowLongPtrW( HWND hwnd, INT offset )
 {
-    return NtUserCallHwndParam( hwnd, offset, NtUserGetWindowLongPtrW );
+    return NtUserGetWindowLongPtrW( hwnd, offset );
 }
 
 /*****************************************************************************
@@ -1834,7 +1834,7 @@ LONG_PTR WINAPI GetWindowLongPtrW( HWND hwnd, INT offset )
  */
 LONG_PTR WINAPI GetWindowLongPtrA( HWND hwnd, INT offset )
 {
-    return NtUserCallHwndParam( hwnd, offset, NtUserGetWindowLongPtrA );
+    return NtUserGetWindowLongPtrA( hwnd, offset );
 }
 
 /*****************************************************************************
diff --git a/dlls/user32/win.h b/dlls/user32/win.h
index d741965d2be..0c5bb2be5a8 100644
--- a/dlls/user32/win.h
+++ b/dlls/user32/win.h
@@ -60,7 +60,6 @@ static inline void WIN_ReleasePtr( WND *ptr )
 
 extern LRESULT HOOK_CallHooks( INT id, INT code, WPARAM wparam, LPARAM lparam, BOOL unicode ) DECLSPEC_HIDDEN;
 
-extern MINMAXINFO WINPOS_GetMinMaxInfo( HWND hwnd ) DECLSPEC_HIDDEN;
 extern LONG WINPOS_HandleWindowPosChanging(HWND hwnd, WINDOWPOS *winpos) DECLSPEC_HIDDEN;
 extern HWND WINPOS_WindowFromPoint( HWND hwndScope, POINT pt, INT *hittest ) DECLSPEC_HIDDEN;
 extern void WINPOS_ActivateOtherWindow( HWND hwnd ) DECLSPEC_HIDDEN;
diff --git a/dlls/user32/winpos.c b/dlls/user32/winpos.c
index 04a3ddb5e21..a00686ee111 100644
--- a/dlls/user32/winpos.c
+++ b/dlls/user32/winpos.c
@@ -64,7 +64,7 @@ void WINAPI SwitchToThisWindow( HWND hwnd, BOOL alt_tab )
  */
 BOOL WINAPI GetWindowRect( HWND hwnd, LPRECT rect )
 {
-    BOOL ret = NtUserCallHwndParam( hwnd, (UINT_PTR)rect, NtUserGetWindowRect );
+    BOOL ret = NtUserGetWindowRect( hwnd, rect );
     if (ret) TRACE( "hwnd %p %s\n", hwnd, wine_dbgstr_rect(rect) );
     return ret;
 }
@@ -105,7 +105,7 @@ int WINAPI GetWindowRgnBox( HWND hwnd, LPRECT prect )
  */
 BOOL WINAPI GetClientRect( HWND hwnd, LPRECT rect )
 {
-    return NtUserCallHwndParam( hwnd, (UINT_PTR)rect, NtUserGetClientRect );
+    return NtUserGetClientRect( hwnd, rect );
 }
 
 
@@ -434,7 +434,7 @@ BOOL WINAPI ClientToScreen( HWND hwnd, LPPOINT lppnt )
  */
 BOOL WINAPI ScreenToClient( HWND hwnd, POINT *pt )
 {
-    return NtUserCallHwndParam( hwnd, (UINT_PTR)pt, NtUserScreenToClient );
+    return NtUserScreenToClient( hwnd, pt );
 }
 
 
@@ -514,18 +514,6 @@ static BOOL get_work_rect( HWND hwnd, RECT *rect )
 }
 
 
-/*******************************************************************
- *           WINPOS_GetMinMaxInfo
- *
- * Get the minimized and maximized information for a window.
- */
-MINMAXINFO WINPOS_GetMinMaxInfo( HWND hwnd )
-{
-    MINMAXINFO info;
-    NtUserCallHwndParam( hwnd, (UINT_PTR)&info, NtUserGetMinMaxInfo );
-    return info;
-}
-
 /***********************************************************************
  *		GetInternalWindowPos (USER32.@)
  */
@@ -594,7 +582,7 @@ static void update_maximized_pos( WND *wnd, RECT *work_rect )
  */
 BOOL WINAPI GetWindowPlacement( HWND hwnd, WINDOWPLACEMENT *wndpl )
 {
-    return NtUserCallHwndParam( hwnd, (UINT_PTR)wndpl, NtUserGetWindowPlacement );
+    return NtUserGetWindowPlacement( hwnd, wndpl );
 }
 
 /* make sure the specified rect is visible on screen */
@@ -849,7 +837,7 @@ LONG WINPOS_HandleWindowPosChanging( HWND hwnd, WINDOWPOS *winpos )
     if (winpos->flags & SWP_NOSIZE) return 0;
     if ((style & WS_THICKFRAME) || ((style & (WS_POPUP | WS_CHILD)) == 0))
     {
-	MINMAXINFO info = WINPOS_GetMinMaxInfo( hwnd );
+	MINMAXINFO info = NtUserGetMinMaxInfo( hwnd );
         winpos->cx = min( winpos->cx, info.ptMaxTrackSize.x );
         winpos->cy = min( winpos->cy, info.ptMaxTrackSize.y );
 	if (!(style & WS_MINIMIZE))
@@ -1081,7 +1069,7 @@ void WINPOS_SysCommandSizeMove( HWND hwnd, WPARAM wParam )
 
       /* Get min/max info */
 
-    minmax = WINPOS_GetMinMaxInfo( hwnd );
+    minmax = NtUserGetMinMaxInfo( hwnd );
     WIN_GetRectangles( hwnd, COORDS_PARENT, &sizingRect, NULL );
     origRect = sizingRect;
     if (style & WS_CHILD)
diff --git a/dlls/win32u/window.c b/dlls/win32u/window.c
index b7a6ebb7090..93c9f15afff 100644
--- a/dlls/win32u/window.c
+++ b/dlls/win32u/window.c
@@ -5019,67 +5019,95 @@ ULONG_PTR WINAPI NtUserCallHwndParam( HWND hwnd, DWORD_PTR param, DWORD code )
 {
     switch (code)
     {
-    case NtUserGetClassLongA:
+    case NtUserCallHwndParam_GetClassLongA:
         return get_class_long( hwnd, param, TRUE );
-    case NtUserGetClassLongW:
+
+    case NtUserCallHwndParam_GetClassLongW:
         return get_class_long( hwnd, param, FALSE );
-    case NtUserGetClassLongPtrA:
+
+    case NtUserCallHwndParam_GetClassLongPtrA:
         return get_class_long_ptr( hwnd, param, TRUE );
-    case NtUserGetClassLongPtrW:
+
+    case NtUserCallHwndParam_GetClassLongPtrW:
         return get_class_long_ptr( hwnd, param, FALSE );
-    case NtUserGetClassWord:
+
+    case NtUserCallHwndParam_GetClassWord:
         return get_class_word( hwnd, param );
-    case NtUserGetClientRect:
+
+    case NtUserCallHwndParam_GetClientRect:
         return get_client_rect( hwnd, (RECT *)param );
-    case NtUserGetMinMaxInfo:
+
+    case NtUserCallHwndParam_GetMinMaxInfo:
         *(MINMAXINFO *)param = get_min_max_info( hwnd );
         return 0;
-    case NtUserGetWindowInfo:
+
+    case NtUserCallHwndParam_GetWindowInfo:
         return get_window_info( hwnd, (WINDOWINFO *)param );
-    case NtUserGetWindowLongA:
+
+    case NtUserCallHwndParam_GetWindowLongA:
         return get_window_long_size( hwnd, param, sizeof(LONG), TRUE );
-    case NtUserGetWindowLongW:
+
+    case NtUserCallHwndParam_GetWindowLongW:
         return get_window_long( hwnd, param );
-    case NtUserGetWindowLongPtrA:
+
+    case NtUserCallHwndParam_GetWindowLongPtrA:
         return get_window_long_ptr( hwnd, param, TRUE );
-    case NtUserGetWindowLongPtrW:
+
+    case NtUserCallHwndParam_GetWindowLongPtrW:
         return get_window_long_ptr( hwnd, param, FALSE );
-    case NtUserGetWindowPlacement:
+
+    case NtUserCallHwndParam_GetWindowPlacement:
         return get_window_placement( hwnd, (WINDOWPLACEMENT *)param );
-    case NtUserGetWindowRect:
+
+    case NtUserCallHwndParam_GetWindowRect:
         return get_window_rect( hwnd, (RECT *)param, get_thread_dpi() );
-    case NtUserGetWindowRelative:
+
+    case NtUserCallHwndParam_GetWindowRelative:
         return HandleToUlong( get_window_relative( hwnd, param ));
-    case NtUserGetWindowThread:
+
+    case NtUserCallHwndParam_GetWindowThread:
         return get_window_thread( hwnd, (DWORD *)param );
-    case NtUserGetWindowWord:
+
+    case NtUserCallHwndParam_GetWindowWord:
         return get_window_word( hwnd, param );
-    case NtUserIsChild:
+
+    case NtUserCallHwndParam_IsChild:
         return is_child( hwnd, UlongToHandle(param) );
-    case NtUserKillSystemTimer:
+
+    case NtUserCallHwndParam_KillSystemTimer:
         return kill_system_timer( hwnd, param );
-    case NtUserMirrorRgn:
+
+    case NtUserCallHwndParam_MirrorRgn:
         return mirror_window_region( hwnd, UlongToHandle(param) );
-    case NtUserMonitorFromWindow:
-        return HandleToUlong( monitor_from_window( hwnd, param, NtUserMonitorFromWindow ));
-    case NtUserScreenToClient:
+
+    case NtUserCallHwndParam_MonitorFromWindow:
+        return HandleToUlong( monitor_from_window( hwnd, param, get_thread_dpi() ));
+
+    case NtUserCallHwndParam_ScreenToClient:
         return screen_to_client( hwnd, (POINT *)param );
-    case NtUserSetCaptureWindow:
-        return set_capture_window( hwnd, param, NULL );
-    case NtUserSetForegroundWindow:
+
+    case NtUserCallHwndParam_SetForegroundWindow:
         return set_foreground_window( hwnd, param );
-    case NtUserSetWindowPixelFormat:
+
+    case NtUserCallHwndParam_SetWindowPixelFormat:
         return set_window_pixel_format( hwnd, param );
+
     /* temporary exports */
     case NtUserIsWindowDrawable:
         return is_window_drawable( hwnd, param );
+
+    case NtUserSetCaptureWindow:
+        return set_capture_window( hwnd, param, NULL );
+
     case NtUserSetWindowStyle:
         {
             STYLESTRUCT *style = (void *)param;
             return set_window_style( hwnd, style->styleNew, style->styleOld );
         }
+
     case NtUserSpyGetMsgName:
         return (UINT_PTR)debugstr_msg_name( param, hwnd );
+
     default:
         FIXME( "invalid code %u\n", code );
         return 0;
diff --git a/include/ntuser.h b/include/ntuser.h
index df89c63b405..eed7e4e78c2 100644
--- a/include/ntuser.h
+++ b/include/ntuser.h
@@ -131,40 +131,6 @@ struct win_hook_params
 #define NTUSER_DPI_PER_MONITOR_AWARE_V2   0x00000022
 #define NTUSER_DPI_PER_UNAWARE_GDISCALED  0x40006010
 
-/* NtUserCallHwndParam codes, not compatible with Windows */
-enum
-{
-    NtUserGetClassLongA,
-    NtUserGetClassLongW,
-    NtUserGetClassLongPtrA,
-    NtUserGetClassLongPtrW,
-    NtUserGetClassWord,
-    NtUserGetClientRect,
-    NtUserGetMinMaxInfo,
-    NtUserGetWindowInfo,
-    NtUserGetWindowLongA,
-    NtUserGetWindowLongW,
-    NtUserGetWindowLongPtrA,
-    NtUserGetWindowLongPtrW,
-    NtUserGetWindowPlacement,
-    NtUserGetWindowRect,
-    NtUserGetWindowRelative,
-    NtUserGetWindowThread,
-    NtUserGetWindowWord,
-    NtUserIsChild,
-    NtUserKillSystemTimer,
-    NtUserMirrorRgn,
-    NtUserMonitorFromWindow,
-    NtUserScreenToClient,
-    NtUserSetCaptureWindow,
-    NtUserSetForegroundWindow,
-    NtUserSetWindowPixelFormat,
-    /* temporary exports */
-    NtUserIsWindowDrawable,
-    NtUserSetWindowStyle,
-    NtUserSpyGetMsgName,
-};
-
 /* NtUserMessageCall codes */
 enum
 {
@@ -861,4 +827,163 @@ static inline BOOL NtUserIsWindowVisible( HWND hwnd )
     return NtUserCallHwnd( hwnd, NtUserCallHwnd_IsWindowVisible );
 }
 
+/* NtUserCallHwndParam codes, not compatible with Windows */
+enum
+{
+    NtUserCallHwndParam_GetClassLongA,
+    NtUserCallHwndParam_GetClassLongW,
+    NtUserCallHwndParam_GetClassLongPtrA,
+    NtUserCallHwndParam_GetClassLongPtrW,
+    NtUserCallHwndParam_GetClassWord,
+    NtUserCallHwndParam_GetClientRect,
+    NtUserCallHwndParam_GetMinMaxInfo,
+    NtUserCallHwndParam_GetWindowInfo,
+    NtUserCallHwndParam_GetWindowLongA,
+    NtUserCallHwndParam_GetWindowLongW,
+    NtUserCallHwndParam_GetWindowLongPtrA,
+    NtUserCallHwndParam_GetWindowLongPtrW,
+    NtUserCallHwndParam_GetWindowPlacement,
+    NtUserCallHwndParam_GetWindowRect,
+    NtUserCallHwndParam_GetWindowRelative,
+    NtUserCallHwndParam_GetWindowThread,
+    NtUserCallHwndParam_GetWindowWord,
+    NtUserCallHwndParam_IsChild,
+    NtUserCallHwndParam_KillSystemTimer,
+    NtUserCallHwndParam_MirrorRgn,
+    NtUserCallHwndParam_MonitorFromWindow,
+    NtUserCallHwndParam_ScreenToClient,
+    NtUserCallHwndParam_SetForegroundWindow,
+    NtUserCallHwndParam_SetWindowPixelFormat,
+    /* temporary exports */
+    NtUserIsWindowDrawable,
+    NtUserSetCaptureWindow,
+    NtUserSetWindowStyle,
+    NtUserSpyGetMsgName,
+};
+
+static inline DWORD NtUserGetClassLongA( HWND hwnd, INT offset )
+{
+    return NtUserCallHwndParam( hwnd, offset, NtUserCallHwndParam_GetClassLongA );
+}
+
+static inline ULONG_PTR NtUserGetClassLongPtrA( HWND hwnd, INT offset )
+{
+    return NtUserCallHwndParam( hwnd, offset, NtUserCallHwndParam_GetClassLongPtrA );
+}
+
+static inline ULONG_PTR NtUserGetClassLongPtrW( HWND hwnd, INT offset )
+{
+    return NtUserCallHwndParam( hwnd, offset, NtUserCallHwndParam_GetClassLongPtrW );
+}
+
+static inline DWORD NtUserGetClassLongW( HWND hwnd, INT offset )
+{
+    return NtUserCallHwndParam( hwnd, offset, NtUserCallHwndParam_GetClassLongW );
+}
+
+static inline WORD NtUserGetClassWord( HWND hwnd, INT offset )
+{
+    return NtUserCallHwndParam( hwnd, offset, NtUserCallHwndParam_GetClassWord );
+}
+
+static inline BOOL NtUserGetClientRect( HWND hwnd, RECT *rect )
+{
+    return NtUserCallHwndParam( hwnd, (UINT_PTR)rect, NtUserCallHwndParam_GetClientRect );
+}
+
+static inline MINMAXINFO NtUserGetMinMaxInfo( HWND hwnd )
+{
+    MINMAXINFO info;
+    NtUserCallHwndParam( hwnd, (UINT_PTR)&info, NtUserCallHwndParam_GetMinMaxInfo );
+    return info;
+}
+
+static inline BOOL NtUserGetWindowInfo( HWND hwnd, WINDOWINFO *info )
+{
+    return NtUserCallHwndParam( hwnd, (UINT_PTR)info, NtUserCallHwndParam_GetWindowInfo );
+}
+
+static inline LONG NtUserGetWindowLongA( HWND hwnd, INT offset )
+{
+    return NtUserCallHwndParam( hwnd, offset, NtUserCallHwndParam_GetWindowLongA );
+}
+
+static inline LONG_PTR NtUserGetWindowLongPtrA( HWND hwnd, INT offset )
+{
+    return NtUserCallHwndParam( hwnd, offset, NtUserCallHwndParam_GetWindowLongPtrA );
+}
+
+static inline LONG_PTR NtUserGetWindowLongPtrW( HWND hwnd, INT offset )
+{
+    return NtUserCallHwndParam( hwnd, offset, NtUserCallHwndParam_GetWindowLongPtrW );
+}
+
+static inline LONG NtUserGetWindowLongW( HWND hwnd, INT offset )
+{
+    return NtUserCallHwndParam( hwnd, offset, NtUserCallHwndParam_GetWindowLongW );
+}
+
+static inline BOOL NtUserGetWindowPlacement( HWND hwnd, WINDOWPLACEMENT *wndpl )
+{
+    return NtUserCallHwndParam( hwnd, (UINT_PTR)wndpl,
+                                NtUserCallHwndParam_GetWindowPlacement );
+}
+
+static inline BOOL NtUserGetWindowRect( HWND hwnd, RECT *rect )
+{
+    return NtUserCallHwndParam( hwnd, (UINT_PTR)rect, NtUserCallHwndParam_GetWindowRect );
+}
+
+static inline HWND NtUserGetWindowRelative( HWND hwnd, UINT rel )
+{
+    return UlongToHandle( NtUserCallHwndParam( hwnd, rel,
+                                               NtUserCallHwndParam_GetWindowRelative ));
+}
+
+static inline DWORD NtUserGetWindowThread( HWND hwnd, DWORD *process )
+{
+    return NtUserCallHwndParam( hwnd, (UINT_PTR)process, NtUserCallHwndParam_GetWindowThread );
+}
+
+static inline WORD NtUserGetWindowWord( HWND hwnd, INT offset )
+{
+    return NtUserCallHwndParam( hwnd, offset, NtUserCallHwndParam_GetWindowWord );
+}
+
+static inline BOOL NtUserIsChild( HWND parent, HWND child )
+{
+    return NtUserCallHwndParam( parent, HandleToUlong(child), NtUserCallHwndParam_IsChild );
+}
+
+static inline BOOL NtUserKillSystemTimer( HWND hwnd, UINT_PTR id )
+{
+    return NtUserCallHwndParam( hwnd, id, NtUserCallHwndParam_KillSystemTimer );
+}
+
+static inline BOOL NtUserMirrorRgn( HWND hwnd, HRGN hrgn )
+{
+    return NtUserCallHwndParam( hwnd, HandleToUlong(hrgn), NtUserCallHwndParam_MirrorRgn );
+}
+
+static inline HMONITOR NtUserMonitorFromWindow( HWND hwnd, DWORD flags )
+{
+    ULONG ret = NtUserCallHwndParam(  hwnd, flags, NtUserCallHwndParam_MonitorFromWindow );
+    return UlongToHandle( ret );
+}
+
+static inline BOOL NtUserScreenToClient( HWND hwnd, POINT *pt )
+{
+    return NtUserCallHwndParam( hwnd, (UINT_PTR)pt, NtUserCallHwndParam_ScreenToClient );
+}
+
+static inline BOOL NtUserSetForegroundWindow( HWND hwnd, BOOL mouse )
+{
+    return NtUserCallHwndParam( hwnd, mouse, NtUserCallHwndParam_SetForegroundWindow );
+}
+
+static inline BOOL NtUserSetWindowPixelFormat( HWND hwnd, int format )
+{
+    return NtUserCallHwndParam( hwnd, format, NtUserCallHwndParam_SetWindowPixelFormat );
+}
+
 #endif /* _NTUSER_ */