CardCheck COM DLL Description:

CardCheck provides developers with a way to validate credit card numbers. It can be used with
any programming language that supports COM: Scripting languages (VBScript,
JavaScript), Visual Basic (Versions 4 and up), VBA (Word, Excel, Access
...), VC++, BC++, Delphi, Power Builder to name only a few. Supported Credit
Cards are: VISA, Master Card - Eurocard, Discover - Novus, American Express,
JCB and En Route.