user32: Provide partial null driver.

dlls/user32/driver.c

@@ -119,10 +119,46 @@ void USER_unload_driver(void)
  * These are fallbacks for entry points that are not implemented in the real driver.
  */
 
+static void CDECL nulldrv_Beep(void)
+{
+}
+
+static BOOL CDECL nulldrv_RegisterHotKey( HWND hwnd, UINT modifiers, UINT vk )
+{
+    return TRUE;
+}
+
+static void CDECL nulldrv_UnregisterHotKey( HWND hwnd, UINT modifiers, UINT vk )
+{
+}
+
 static void CDECL nulldrv_DestroyCursorIcon( HCURSOR cursor )
 {
 }
 
+static void CDECL nulldrv_SetCursor( HCURSOR cursor )
+{
+}
+
+static BOOL CDECL nulldrv_GetCursorPos( LPPOINT pt )
+{
+    return TRUE;
+}
+
+static BOOL CDECL nulldrv_SetCursorPos( INT x, INT y )
+{
+    return TRUE;
+}
+
+static BOOL CDECL nulldrv_ClipCursor( LPCRECT clip )
+{
+    return TRUE;
+}
+
+static void CDECL nulldrv_UpdateClipboard(void)
+{
+}
+
 static BOOL CDECL nodrv_CreateWindow( HWND hwnd )
 {
     static int warned;
@@ -137,10 +173,29 @@ static BOOL CDECL nodrv_CreateWindow( HWND hwnd )
     return FALSE;
 }
 
+static BOOL CDECL nulldrv_CreateDesktopWindow( HWND hwnd )
+{
+    return TRUE;
+}
+
+static BOOL CDECL nulldrv_CreateWindow( HWND hwnd )
+{
+    return TRUE;
+}
+
 static void CDECL nulldrv_DestroyWindow( HWND hwnd )
 {
 }
 
+static void CDECL nulldrv_FlashWindowEx( FLASHWINFO *info )
+{
+}
+
+static void CDECL nulldrv_GetDC( HDC hdc, HWND hwnd, HWND top_win, const RECT *win_rect,
+                                 const RECT *top_rect, DWORD flags )
+{
+}
+
 static DWORD CDECL nulldrv_MsgWaitForMultipleObjectsEx( DWORD count, const HANDLE *handles, DWORD timeout,
                                                         DWORD mask, DWORD flags )
 {
@@ -161,10 +216,18 @@ static void CDECL nulldrv_SetFocus( HWND hwnd )
 {
 }
 
+static void CDECL nulldrv_SetLayeredWindowAttributes( HWND hwnd, COLORREF key, BYTE alpha, DWORD flags )
+{
+}
+
 static void CDECL nulldrv_SetParent( HWND hwnd, HWND parent, HWND old_parent )
 {
 }
 
+static void CDECL nulldrv_SetWindowRgn( HWND hwnd, HRGN hrgn, BOOL redraw )
+{
+}
+
 static void CDECL nulldrv_SetWindowIcon( HWND hwnd, UINT type, HICON icon )
 {
 }
@@ -187,6 +250,12 @@ static LRESULT CDECL nulldrv_SysCommand( HWND hwnd, WPARAM wparam, LPARAM lparam
     return -1;
 }
 
+static BOOL CDECL nulldrv_UpdateLayeredWindow( HWND hwnd, const UPDATELAYEREDWINDOWINFO *info,
+                                               const RECT *window_rect )
+{
+    return TRUE;
+}
+
 static LRESULT CDECL nulldrv_WindowMessage( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam )
 {
     return 0;
@@ -367,6 +436,43 @@ void CDECL __wine_set_user_driver( const struct user_driver_funcs *funcs, UINT v
     driver = HeapAlloc( GetProcessHeap(), 0, sizeof(*driver) );
     *driver = *funcs;
 
+#define SET_USER_FUNC(name) \
+    do { if (!driver->p##name) driver->p##name = nulldrv_##name; } while(0)
+
+    SET_USER_FUNC(Beep);
+    SET_USER_FUNC(RegisterHotKey);
+    SET_USER_FUNC(UnregisterHotKey);
+    SET_USER_FUNC(DestroyCursorIcon);
+    SET_USER_FUNC(SetCursor);
+    SET_USER_FUNC(GetCursorPos);
+    SET_USER_FUNC(SetCursorPos);
+    SET_USER_FUNC(ClipCursor);
+    SET_USER_FUNC(UpdateClipboard);
+    SET_USER_FUNC(CreateDesktopWindow);
+    SET_USER_FUNC(CreateWindow);
+    SET_USER_FUNC(DestroyWindow);
+    SET_USER_FUNC(FlashWindowEx);
+    SET_USER_FUNC(GetDC);
+    SET_USER_FUNC(MsgWaitForMultipleObjectsEx);
+    SET_USER_FUNC(ReleaseDC);
+    SET_USER_FUNC(SetCapture);
+    SET_USER_FUNC(SetFocus);
+    SET_USER_FUNC(SetLayeredWindowAttributes);
+    SET_USER_FUNC(SetParent);
+    SET_USER_FUNC(SetWindowRgn);
+    SET_USER_FUNC(SetWindowIcon);
+    SET_USER_FUNC(SetWindowStyle);
+    SET_USER_FUNC(SetWindowText);
+    SET_USER_FUNC(ShowWindow);
+    SET_USER_FUNC(SysCommand);
+    SET_USER_FUNC(UpdateLayeredWindow);
+    SET_USER_FUNC(WindowMessage);
+    SET_USER_FUNC(WindowPosChanging);
+    SET_USER_FUNC(WindowPosChanged);
+    SET_USER_FUNC(SystemParametersInfo);
+    SET_USER_FUNC(ThreadDetach);
+#undef SET_USER_FUNC
+
     prev = InterlockedCompareExchangePointer( (void **)&USER_Driver, driver, &lazy_load_driver );
     if (prev != &lazy_load_driver)
     {