I don't know if it is the easiest, but try my stoneage FPD code in Message #742290 and see if it works for you.

>What is the easist way to construct an Exclusive-or checksum of a character string?
>
>Is there a single command/program I can use, or do I need to process the string char by char and use a combination of BITXOR() and ASC() commands?