MI-L Changing Layout Units

[Simon Roy]

Hi,
 
            Is it possible to change the units (cm to in) of an existing
layout via MapBasic?  I tried the Set Coordsys Layout statement, but it
does not seem to do anything on an existing layout.  The idea is to be
able to toggle between inches and centimeters with a click of a mouse.
 
Thank you
 
Simon