Set EvtGetEvent to generate a nilEvent about every second or 1/2 second.
Trap the nilEvent in your dialog's event loop (be sure to return false when
you do handle the nilEvent) If its time to perform your function, then do
so. If not, ignore the nilEvent.
Read the description of timeout parameter in the EvtGetEvent function.
There are other methods of generating timers in the Palm OS, search the list
archives for examples.
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