Removing WS_VISIBLE without updating the window state with
SWP_FRAMECHANGED is enough to trigger d3d9's hidden window codepath
(native and in Wine), but doesn't actually hide the window. This
prevents unpredictable focus changes on focus follows mouse WMs.
Signed-off-by: Stefan Dösinger <stefan@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>