http://bugs.winehq.org/show_bug.cgi?id=21820
--- Comment #4 from Andrew Nguyen arethusa26@gmail.com 2010-02-22 22:09:11 --- Created an attachment (id=26420) --> (http://bugs.winehq.org/attachment.cgi?id=26420) user32: Initialize the focus handle before sending WM_INITDIALOG
This seems to allow the dialog to be displayed correctly, although the app runs into more problems later.