http://bugs.winehq.org/show_bug.cgi?id=11111
--- Comment #8 from Dmitry Timoshkov dmitry@codeweavers.com 2008-04-07 00:26:20 --- Actually that patch doesn't fix this bug, the window in question does have WS_EX_TOOLWINDOW style set, but not the dialog styles.
The bug 11026 is fixed by it though.