This point can't be emphasized enough. A Zip Code is NOT a number. It is a
string containing a sequence of numeric characters. Some Zip Codes include
hyphens, as in:
12345-0123
Some Zip Codes Begin with '0'. If you treat them like numbers, you will
corrupt the data.
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HTH,
Kevin Spencer
..Net Developer
Microsoft MVP
I get paid good money to
solve puzzles for a living