GetUpdateRect can be called with a NULL rect.

bcb3490d · Rein Klazes · Alexandre Julliard · 42d55786 · bcb3490d
Commit bcb3490d authored Dec 08, 2004 by Rein Klazes Committed by Alexandre Julliard Dec 08, 2004
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Showing with 2 additions and 2 deletions

painting.c dlls/user/painting.c +2 -2

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--- a/dlls/user/painting.c
+++ b/dlls/user/painting.c
@@ -534,12 +534,12 @@ BOOL WINAPI GetUpdateRect( HWND hwnd, LPRECT rect, BOOL erase )

    if (!(update_rgn = send_ncpaint( hwnd, NULL, &flags ))) return FALSE;

-    GetRgnBox( update_rgn, rect );
+    if (rect) GetRgnBox( update_rgn, rect );

    send_erase( hwnd, flags, update_rgn, &dummy, &hdc );
    if (hdc)
    {
-        DPtoLP( hdc, (LPPOINT)rect, 2 );
+        if (rect) DPtoLP( hdc, (LPPOINT)rect, 2 );
        ReleaseDC( hwnd, hdc );
    }
    else DeleteObject( update_rgn );