Limiting Character Input In An NSTextField

FROM : Ian was here
DATE : Tue Apr 26 23:59:24 2005

Does anyone know how to limit the number of characters
that can be entered into an NSTextField. I have a
unique situation where only five numbers should be
entered, and each number should only be a value from 1
to 5. I tried subclassing NSTextField and using
KeyDown() to catch each number entered, but the
KeyDown() method never gets called?!?!


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