http://bugs.winehq.org/show_bug.cgi?id=13554
--- Comment #9 from Philip Nilsson leffeman@gmail.com 2009-08-15 08:01:15 --- I used a program called PEditor to add comctl32.dll to the import table (added InitCommonControls) and then it worked (msctls_trackbar32 is initialized in DllMain).
I guess Windows does something Wine does not.