>>I will try it. You mean INKEY() without a parameter so that no to slow down the loop even more, right?
>>
>>Thank you.
>
>Actually, I meant that you can allow user input, e.g. I usually run following message during similar loop:
>wait "Processing... Press Ctrl-S To Abort.' window nowait

Another alternative may be to test mouse coordinates and mousedown at some critical points of the loop and see if the button was pressed this way.