http://bugs.winehq.org/show_bug.cgi?id=17987
--- Comment #2 from Igor Tarasov tarasov.igor@gmail.com 2009-04-10 01:10:34 --- Created an attachment (id=20356) --> (http://bugs.winehq.org/attachment.cgi?id=20356) test patch
Try this patch with latest git.
Not sure if this is the source of problem, but this is where it might be, since msdn states that it should return only cx parameter, and nothing else, and tests.
Another source might be in undocumented buggy behaviour, that was removed with that patch. In case this patch won't help, I'll do another one, trying to reproduce that undocumented behaviour as precise as possible.