And, in case you haven't already looked it up, WaitForChange() accepts a millisecond time-out parameter. So, you can call $changed = $clip->WaitForChange(1); to get a "non-blocking" wait.

bbfu
Black flowers blossom
Fearless on my breath

In reply to Re3: Does this Tk program require a thread? by bbfu
in thread Does this Tk program require a thread? by nysus

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