Simon,

The timer event can indeed trigger while you are still handling the timer.

If your code might take longer than the timer.Interval to handle you should code your .Timer() event like:

this.Enabled = .f. && disable timer

... long running code goes here

this.Enabled = .t. && reenable timer

>I read the VFP documentation but I could not tell if the timer event can be trigger while in the timer event or is it disabled until the timer event completes. I am trying to trace down a strange experience where the debugger shows a timer control disabled and the timer event still occuring (There is only one timer on the form).