Index: defwnd.c
===================================================================
--- defwnd.c	(revision 74687)
+++ defwnd.c	(working copy)
@@ -97,6 +97,11 @@
    RECT Rect;
    LONG style = pWnd->style;
 
+   if (!(pWnd->state2 & WNDS2_WMCREATEMSGPROCESSED))
+   {
+       return 0;
+   }
+
    IntGetClientRect(pWnd, &Rect);
    IntMapWindowPoints(pWnd, (style & WS_CHILD ? IntGetParent(pWnd) : NULL), (LPPOINT) &Rect, 2);