http://bugs.winehq.org/show_bug.cgi?id=22369
--- Comment #10 from a.m.winehq@gmail.com 2010-04-17 05:39:30 ---
Once again, how do you know what is the exact source of the problem with that application? And what is the reason you think that the source is not right?
All MDI child windows must be with WS_EX_MDICHILD style.
Do you understand?