https://bugs.winehq.org/show_bug.cgi?id=29103
--- Comment #22 from super_man@post.com --- If I am not mistaken the problem is somewhere at
http://source.winehq.org/git/wine.git/blob/65d699eb5f7fc151197f3dc9f36499ee3...
function SetWindowPos
2286 winpos.hwndInsertAfter = WIN_GetFullHandle(hwndInsertAfter);
winpos.hwndInsterAfter gets NULL. I don't know how wine should cope with such value.
wine 1.7.54 (still valid issue)