http://bugs.winehq.org/show_bug.cgi?id=13554
--- Comment #10 from Vitaliy Margolen vitaliy@kievinfo.com 2009-08-15 11:18:27 --- (In reply to comment #9)
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).
Looks like a common bug in many app (forgetting to do what MSDN explicitly required applications to do). Relying that something else will do it for you (like explorer) is bad.
Might be worth adding InitCommonControls() to the Wine's explorer.