ok I have a friend who's got a school project to submit on friday. She has to write a code for self checking numbers in VB. Self checking numbers is like when u enter lets a credit card number and the program checks those same numbers to see if its really them. So I have looked it up in a VB book that I have and I found something along those lines but I'm asking for extra help because it might not be enough or I might be wrong. Any help would be appreciated.thnx