http://bugs.winehq.org/show_bug.cgi?id=10006
--- Comment #10 from Dmitry Timoshkov dmitry@codeweavers.com 2008-01-24 04:24:52 --- (In reply to comment #9)
Please note ros explorer is a independent project to reactos and can be uses as a unstable windows manager replacement for windows. So I guess that is not enough to make it up list. Yes there is 1 application at least that does have it.
ROS explorer doesn't count as a real world application that uses undocumented Windows APIs. Besides the question remains where ROS explorer developers has acquired a not published information.