http://bugs.winehq.org/show_bug.cgi?id=22369
Summary: A child window without WS_EX_MDICHILD style should not be tiled by the WM_MDITILE message. Product: Wine Version: unspecified Platform: All OS/Version: All Status: UNCONFIRMED Severity: normal Priority: P2 Component: user32 AssignedTo: wine-bugs@winehq.org ReportedBy: a.m.winehq@gmail.com
In user32/mdi.c -> MDITile -> #L763(wine-1.1.42) for-loop "remove all the windows we don't want",
the windows without WS_EX_MDICHILD window style should be also removed from win_array.
MDICascade is also.