http://bugs.winehq.org/show_bug.cgi?id=12094
--- Comment #5 from Alexandre Julliard julliard@winehq.org 2008-05-21 04:46:59 --- Created an attachment (id=13210) --> (http://bugs.winehq.org/attachment.cgi?id=13210) Add buttons 8 and 9
For now you could try something like this.