http://bugs.winehq.org/show_bug.cgi?id=31979
--- Comment #42 from Bruno Jesus 00cpxxx@gmail.com 2012-10-18 07:22:02 CDT --- (In reply to comment #41)
Created attachment 42179 [details] basic tests for ScreenToClient
So here's the test code. I haven't run it on windows yet because I'm having a heck of a time getting wine correctly configured on my windows machine and each attempt (configure && make depend) takes about an hour :(
You should talk to Christian Costa, he's been working on tests too. He sent a patch recently (http://source.winehq.org/patches/data/91034) and there is a discussion about it (http://www.mail-archive.com/wine-devel@winehq.org/msg76697.html).