Hello Tamar

Many thanks for your reply, but the purpose to use a Timer um VFP is running a SQL query in a TEXT..To and create a cursor inside a browlist
If the cursor has data showing the same, if not data does nothing.
in these 2 cases after run i want restart the timer and only after 30 minutes re-run the instructions.
I can not use the QUIT command because it closes the whole program.
I've been looking for some example of how to use the scheduler Windoes tasks in VFP, but found no example for what I want.
If you can show me a link to an example, thank you very much to show me the link.

I hope you can give me another suggestion.

Best regards
Luis