user32: Pre-allocate the window procedure for the desktop class.

dlls/user32/controls.h

@@ -33,6 +33,7 @@
 
 enum builtin_winprocs
 {
+    /* dual A/W procs */
     WINPROC_BUTTON = 0,
     WINPROC_COMBO,
     WINPROC_DEFWND,
@@ -42,7 +43,10 @@ enum builtin_winprocs
     WINPROC_MDICLIENT,
     WINPROC_SCROLLBAR,
     WINPROC_STATIC,
-    NB_BUILTIN_WINPROCS
+    /* unicode-only procs */
+    WINPROC_DESKTOP,
+    NB_BUILTIN_WINPROCS,
+    NB_BUILTIN_AW_WINPROCS = WINPROC_DESKTOP
 };
 
 #define WINPROC_HANDLE (~0u >> 16)
@@ -74,6 +78,8 @@ extern const struct builtin_class_descr MESSAGE_builtin_class DECLSPEC_HIDDEN;
 extern const struct builtin_class_descr SCROLL_builtin_class DECLSPEC_HIDDEN;
 extern const struct builtin_class_descr STATIC_builtin_class DECLSPEC_HIDDEN;
 
+extern LRESULT WINAPI DesktopWndProc(HWND,UINT,WPARAM,LPARAM) DECLSPEC_HIDDEN;
+
 /* Wow handlers */
 
 struct wow_handlers16

dlls/user32/desktop.c

@@ -38,8 +38,6 @@ static HBITMAP hbitmapWallPaper;
 static SIZE bitmapSize;
 static BOOL fTileWallPaper;
 
-static LRESULT WINAPI DesktopWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam );
-
 
 /*********************************************************************
  * desktop class descriptor
@@ -49,7 +47,7 @@ const struct builtin_class_descr DESKTOP_builtin_class =
     (LPCWSTR)DESKTOP_CLASS_ATOM, /* name */
     CS_DBLCLKS,           /* style */
     NULL,                 /* procA (winproc is Unicode only) */
-    DesktopWndProc,       /* procW */
+    BUILTIN_WINPROC(WINPROC_DESKTOP), /* procW */
     0,                    /* extra */
     IDC_ARROW,            /* cursor */
     (HBRUSH)(COLOR_BACKGROUND+1)    /* brush */
@@ -115,7 +113,7 @@ static HBITMAP DESKTOP_LoadBitmap( HDC hdc, const char *filename )
 /***********************************************************************
  *           DesktopWndProc
  */
-static LRESULT WINAPI DesktopWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
+LRESULT WINAPI DesktopWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
 {
     if (message == WM_NCCREATE) return TRUE;
     return 0;  /* all other messages are ignored */

dlls/user32/winproc.c

@@ -74,6 +74,7 @@ static WINDOWPROC winproc_array[MAX_WINPROCS] =
     { MDIClientWndProcA, MDIClientWndProcW },  /* WINPROC_MDICLIENT */
     { ScrollBarWndProcA, ScrollBarWndProcW },  /* WINPROC_SCROLLBAR */
     { StaticWndProcA, StaticWndProcW },        /* WINPROC_STATIC */
+    { NULL, DesktopWndProc },                  /* WINPROC_DESKTOP */
 };
 
 static UINT winproc_used = NB_BUILTIN_WINPROCS;
@@ -104,14 +105,14 @@ static inline WINDOWPROC *find_winproc( WNDPROC funcA, WNDPROC funcW )
 {
     unsigned int i;
 
-    for (i = 0; i < NB_BUILTIN_WINPROCS; i++)
+    for (i = 0; i < NB_BUILTIN_AW_WINPROCS; i++)
     {
         /* match either proc, some apps confuse A and W */
         if (funcA && winproc_array[i].procA != funcA && winproc_array[i].procW != funcA) continue;
         if (funcW && winproc_array[i].procA != funcW && winproc_array[i].procW != funcW) continue;
         return &winproc_array[i];
     }
-    for (i = NB_BUILTIN_WINPROCS; i < winproc_used; i++)
+    for (i = NB_BUILTIN_AW_WINPROCS; i < winproc_used; i++)
     {
         if (funcA && winproc_array[i].procA != funcA) continue;
         if (funcW && winproc_array[i].procW != funcW) continue;