sending menupick to combobox button

[Mark Swindell]

I have a combobox button with several menuitems in it.  Next to it is a 
plain radio button which serves to mark the state (on/off) of the 
combobox.

When  the radio button is cllcked,  I need it to send a menupick to the 
combobox so that the current combobox's label's menupick script runs, 
just as if the user had selected the option from the combobox's own 
menu options.  (There's a mouthful.)

What is the correct syntax for making this happen?

Thanks,
Mark