In certain forms like entering credit card info or activation codes, there are a series of fields. For example: a credit card fields are four fields and have four characters each.  in the first box I type the first four characters, but after I enter the fourth character, the cursor moves to the next field for it's four characters.  How do I make my forms do that?

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Reply from Alex Hedley:

OnKeyPress check the length, if over 4 move to next field with a .Focus() event.