>>A form has a checkbox that says: "Stop processing".
>>
>>The form has timers that run code.
>>
>>The problem is that I can only get access to the checkbox (to check it) when there is a gap. That is when the code has stopped running and the next timer event has not yet started.
>>
>>I would like to be able to "Stop processing" at any time. Any thoughts on how this can be accomplished?
>
>A DOEVENTS at certain points in the timer code? It'll probably make it a tad slower, but should give the code a chance to process user input.

Thanks for the tip on using DOEVENTS.

I read up on this in Hackers and they have a tip on combining it with MDOWN(). I implemented this.

It works OK in a test form with a loop (for kk = 1 to 10000), where one can test for it at every iteration. However, where there is a lot of code being run in the loop, it doesn't work that well, as there is not enough time for the DOEVENTS to register the user's mouse click.

I guess I need to do it after every line of code.

What do you think of using ON KEY LABEL to stop processing?

Cyril