http://bugs.winehq.org/show_bug.cgi?id=22264
--- Comment #24 from Dmitry Timoshkov dmitry@codeweavers.com 2010-06-02 02:56:30 --- (In reply to comment #22)
In Vista, for example, the Cancel button does not get dotted when you click and hold.
Because Vista uses themed buttons, which use different hilighting.