howto disable alt-mouse click window dragging

[Jeremy Huddleston]

Is there an option to disable the window dragging feature of the xfce4
window manager?  It makes it impossible to use Maya and difficult to use
Shake...

If no, could someone point me to where I should look in the source?
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
URL: <http://mail.xfce.org/pipermail/xfce/attachments/20040423/418a3421/attachment.pgp>