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Catching a click during a loop

Subject: Catching a click during a loop
From: Mark Williams <email@hidden>
Date: Sat, 30 Jul 2005 13:56:39 -0700
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I have a program with a rather lengthy process, and I would like to be able to click cancel and have the operation canceled. This process is preformed within a while loop. I have tried running it in a new thread, I have tried the runUntilDate and neither seems to allow my cancel button to be clicked (You click and nothing happens.) until the process is complete. To complicate matter parts of the app are in plain old C. no OBJ-C. and there is a loop within a loop that is in C. Does any one have a suggestion as to how I can get my app to see the click?

Mark.
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