That's pretty good - maybe I should change my caption to "DO NOT CANCEL" or "Do Not Assume this application is : [not responding]". Anyway, I can't say for sure that the DoEvents totally eliminated the Not Responding error, but it has cut it down. I get far fewer calls that the program was rebooted...

Rob
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>I've tried the trick I proposed the other day: while in a tight loop, change the caption of your _screen or top level form to something like "Busy, therefore :", and in the Task Manager it will write "Busy, therefore : [not responding]". Restore to normal caption when you get out.
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>Didn't try under NT, though.