http://bugs.winehq.org/show_bug.cgi?id=12540
--- Comment #8 from Igor Tarasov tarasov.igor@gmail.com 2008-05-08 14:01:46 --- (In reply to comment #7)
Does it means that there's a bug in application (or maybe even - the MFC libraries) that gets handled well by user32?
I'm not sure where the bug is exactly (where this ID is being generated - in application or in some system library). But I am pretty sure that User32.dll has some kind of workaround (some extra checkups) for this situation, since it works well on Windows.