Excellent quote. In summary: 

# I'm about to become busy!
$mw->Busy;
$mw->update;

some_busy_sub_call();

# Ok, I'm not busy anymore
$mw->Unbusy;
$mw->update;

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In reply to Re^2: How do I set a busy cursor in Tk by radiantmatrix
in thread How do I set a busy cursor in Tk by GrandFather

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