>Can anyone tell me the rules to validate a credit card number?
>
>I need to pre-validate a file of credit card debits before we upload it to avoid having to...
>
>- stop the upload
>- edit the text file to remove the invalid card number
>- re-start the upload
>
>I know that numbers begining with 4 are MC (or Visa) and numbers beginning with 5 are Visa ( or MC :) ). Is it true that all numbers must have 16 digits and are they always 4 groups of 4 numbers?
>
>Any help is appreciated...
>
>TIA

Larry,
Check the Classes - VCX sction of the file library. I uploaded a couple of classes that do what you need. Look for CredCard.Zip and CredCrd6.Zip (VFP 6)