The short answer is to go to this web page:
http://www.inria.fr/koala/colas/mouse-wheel-scroll/
The long answer is that you'll find instructions
there for binding your scroll events to mouse
buttons 4 and 5. XFree86 understands up to 5 mouse
buttons. Then, you're not done. You'll need to make
your applications aware that "mouse click 4" means
"up" and "mouse click 5" means "down" (or is that
vice versa?)
I have emacs, xterm, netscape, and tcl/tk all
working fine with my wheeled mouse.
> Hi all...
> I'ev been reading all the comp.os.linux.* groups for about a month, and
> read all the FAQ's etc I can lay my hands on, but I still don't have a
> clear picture of how to get the wheel going on the MS INTELLIMOUSE
> (either as a wheel or as a third button). Can someone *please* help
> me..??!
> TIA
> -Macca