http://bugs.winehq.org/show_bug.cgi?id=29829
--- Comment #3 from Vitaliy Margolen vitaliy-bugzilla@kievinfo.com 2012-02-08 08:31:55 CST --- Using native comctl32: WINEDEBUG=bitblt wine explorer 2>&1 | grep StretchBlt | cut -d' ' -f18 | sort | uniq rop=220326 rop=660046 rop=8800c6 rop=cc0020
Last three are SRCINVERT, SRCAND, and SRCCOPY. First is the one that makes black background.