http://bugs.winehq.org/show_bug.cgi?id=33235
--- Comment #1 from Nikolay Sivov bunglehead@gmail.com 2013-03-17 15:17:57 CDT --- It doesn't send it to new parent cause it keeps notification handle passed on creation and it's never updated. Similar issue for user controls is described here http://support.microsoft.com/kb/104069. Did you verify that it works with native comctl32 in wine?