Based on http://www.beachnet.com/~hstiles/cardtype.html

Creates next string key from the passed one using specified set of characters

Adler32 is different from CRC32. It's much faster but a little bit less reliable. The free ZLIB.DLL from http://www.zlib.net/ has a function to calculate Adler32.

The code below shows how to add a background image to the VFP desktop using the VFP Image control.

Code is based on Building Applications with Microsoft Outlook Version 2002