http://bugs.winehq.org/show_bug.cgi?id=13112
--- Comment #7 from Vincent Povirk madewokherd@gmail.com 2008-11-15 21:16:02 --- According to our tests for setpos, Wine is actually missing some WM_PAINT messages, and the whole lot are todo because of that. That makes it impossible to test for the absence of a WM_PAINT on Wine, though we can at least verify the correct behavior.