reset volumes to zero with a controller

Is it possible to reset all track volumes (and master volume) to zero with a single cc from a surface controller?  I have a kork nanocontroller and am using Sonar as a vst host for live performance.  The sliders and knobs are assigned to various things, including remotely controlling track levels.  I was wondering if there was a simple way to use one of the buttons to basically reset all the volumes to zero.
 
Thanks in advance....
 
Steve