stopping an on-screen timer

[Peter T. Evensen]

What is the best way to display a timer on the screen and then have it 
stoppable?

Something like the following would work for the timer

on UpdateTimer
   -- update the display
   send UpdateTimer to me in 1 sec
end UpdateTimer

My question is how best to stop the timer?

Is it better to look for the UpdateTimer message in the pendingMessages and 
cancel it?
Have a global variable indicating the timer is active and only send the 
UpdateTimer to me if it is active?

What have other people used?

Peter T. Evensen
http://www.PetersRoadToHealth.com
314-629-5248 or 888-628-4588