https://bugs.winehq.org/show_bug.cgi?id=44286
--- Comment #5 from Piotr Caban piotr.caban@gmail.com --- (In reply to Fabian Maurer from comment #4)
Sorry if I'm being too curious, but why do we need to redraw it even if CBF_NOREDRAW is set?
In this case we're just passing the message to edit control. The edit control is responsible for handling the WM_SETREDRAW/drawing (WM_SETREDRAW is forwarded to edit control as well). It needs to be done that way so we behave identical as native.
In wine edit control ignores WM_SETREDRAW calls so the openmpt application works. Probably edit control should handle WM_SETREDRAW and do redraw when drawing is enabled. But it's a different issue probably not to be fixed during codefreeze.