http://bugs.winehq.org/show_bug.cgi?id=12553
--- Comment #18 from Dmitry Timoshkov dmitry@codeweavers.com 2009-02-25 22:57:14 --- (In reply to comment #17)
That means that REBAR_StyleChanged handler should be removed, and an original style (the window was created with) should be used.
Although a test case is required to see what happens in reality.