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Alright thanks.

Well , I have a button for each digit 0-9 , essentially if a user clicks a button whilst PIN textbox already has 4 digits ( each digit appends onto current values in textbox ) I'd like the buttons to...

Basically , I have a PIN textbox in which I want to limit to 4 characters. However I don't think the max length property/code way works as the user doesn't type in the PIN, instead, the PIN is...