Instead of calling SendMessage, similarly to the SW_HIDE case.

Based on a patch by Kimmo Myllyvirta <kimmo.myllyvirta@gmail.com>.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=39731Signed-off-by: Rémi Bernon <rbernon@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>