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

dlls/user32/controls.h

@@ -47,6 +47,7 @@ enum builtin_winprocs
     WINPROC_DESKTOP,
     WINPROC_ICONTITLE,
     WINPROC_MENU,
+    WINPROC_MESSAGE,
     NB_BUILTIN_WINPROCS,
     NB_BUILTIN_AW_WINPROCS = WINPROC_DESKTOP
 };
@@ -83,6 +84,7 @@ extern const struct builtin_class_descr STATIC_builtin_class DECLSPEC_HIDDEN;
 extern LRESULT WINAPI DesktopWndProc(HWND,UINT,WPARAM,LPARAM) DECLSPEC_HIDDEN;
 extern LRESULT WINAPI IconTitleWndProc(HWND,UINT,WPARAM,LPARAM) DECLSPEC_HIDDEN;
 extern LRESULT WINAPI PopupMenuWndProc(HWND,UINT,WPARAM,LPARAM) DECLSPEC_HIDDEN;
+extern LRESULT WINAPI MessageWndProc(HWND,UINT,WPARAM,LPARAM) DECLSPEC_HIDDEN;
 
 /* Wow handlers */
 

dlls/user32/message.c

@@ -91,13 +91,13 @@ struct send_message_info
 
 /* Message class descriptor */
 static const WCHAR messageW[] = {'M','e','s','s','a','g','e',0};
-static LRESULT WINAPI message_winproc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam );
+
 const struct builtin_class_descr MESSAGE_builtin_class =
 {
     messageW,             /* name */
     0,                    /* style */
     NULL,                 /* procA (winproc is Unicode only) */
-    message_winproc,      /* procW */
+    BUILTIN_WINPROC(WINPROC_MESSAGE), /* procW */
     0,                    /* extra */
     IDC_ARROW,            /* cursor */
     0                     /* brush */
@@ -333,11 +333,11 @@ static inline BOOL get_pending_wmchar( MSG *msg, UINT first, UINT last, BOOL rem
 
 
 /***********************************************************************
- *           message_winproc
+ *           MessageWndProc
  *
  * Window procedure for "Message" windows (HWND_MESSAGE parent).
  */
-static LRESULT WINAPI message_winproc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
+LRESULT WINAPI MessageWndProc( 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

@@ -77,6 +77,7 @@ static WINDOWPROC winproc_array[MAX_WINPROCS] =
     { NULL, DesktopWndProc },                  /* WINPROC_DESKTOP */
     { NULL, IconTitleWndProc },                /* WINPROC_ICONTITLE */
     { NULL, PopupMenuWndProc },                /* WINPROC_MENU */
+    { NULL, MessageWndProc },                  /* WINPROC_MESSAGE */
 };
 
 static UINT winproc_used = NB_BUILTIN_WINPROCS;