See description here

http://www.grill.org/rodney/mclass/mlswitch/index.html

also here
http://www.peachparts.com/shopforum/showthread.php3?t=111323&highlight=window+switch

You have to replace the entire window switch assembly (all 4 windows plus the other buttons) if you broke the existing one. Not that difficult a job - took maybe 45 minutes, IIRC.