http://bugs.winehq.org/show_bug.cgi?id=33149
--- Comment #12 from Anastasius Focht focht@gmx.net 2013-03-11 16:19:43 CDT --- Hello Dmitry,
--- quote --- Do you have Windows around to check with Spy++ or similar tool what styles MessageBox and splash windows have there? --- quote ---
Sure, "WinSpector" is a nice Spy++ like tool (see screenshots attached to the bug that shows the tool in action).
Appdb: http://appdb.winehq.org/objectManager.php?sClass=application&iId=9148
Unfortunately the application is discontinued (abandoned?) ... though the last version still works fine.
Download: http://www.softpedia.com/get/Security/Security-Related/Winspector.shtml
Regards