From: Dmitry Timoshkov <dmitry(a)baikal.ru> Signed-off-by: Dmitry Timoshkov <dmitry(a)baikal.ru> --- dlls/win32u/dce.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/dlls/win32u/dce.c b/dlls/win32u/dce.c index 8f804b9c7ce..cd835928c50 100644 --- a/dlls/win32u/dce.c +++ b/dlls/win32u/dce.c @@ -1893,7 +1893,15 @@ INT WINAPI NtUserGetUpdateRgn( HWND hwnd, HRGN hrgn, BOOL erase ) if ((update_rgn = send_ncpaint( hwnd, NULL, &flags ))) { - retval = NtGdiCombineRgn( hrgn, update_rgn, 0, RGN_COPY ); + struct window_rects rects; + HRGN client_rgn; + + get_window_rects( hwnd, COORDS_SCREEN, &rects, get_thread_dpi() ); + + client_rgn = NtGdiCreateRectRgn( rects.client.left, rects.client.top, rects.client.right, rects.client.bottom ); + retval = NtGdiCombineRgn( hrgn, update_rgn, client_rgn, RGN_AND ); + NtGdiDeleteObjectApp( client_rgn ); + if (send_erase( hwnd, flags, update_rgn, NULL, NULL )) { flags = UPDATE_DELAYED_ERASE; -- GitLab https://gitlab.winehq.org/wine/wine/-/merge_requests/5665