>>Hi all,
>>
>>My app needs to verify a credit card number OFFLINE (by verifying that it doesn't fail a check digit test) before connecting up to the credit card service for full verification. Anyone know the algorithm(s) for this?
>>
>>David Abraham
>
>Steven Ruhl wrote and uploaded a class that does this. You can get it here in the files section.

Eric,
Thanks for the mention, you saved me from shameless self promotion.

There are two classes in the files section in the Classes - VCX category. CredCard.zip for VFP 3, 5 and 6 and CredCrd6.zip for VFP 6 only. CredCrd6.zip takes advantage of the access and assign methods for a cleaner interface.

If anyone is interested, I am in the process of doing another version of it in Java. Management is having grandiose visions of thin clients with Java for everything now (wish they'd share their drugs <g>). As soon as I figure out string and stringbuffer classes it will be finished.