Windows handles strings perfectly well, why anyone would choose to convert to number for this is beyond me. Its not as though you are ever going to do
N1 = N2 + N3
where N2 and N3 are a couple of PIN numbers !
I have seen the same wierdiosities in databases where people thought it was a good idea to store phone numbers as numeric fields. Great until the operating system converts the numbers to floating point and back !
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