I've been looking into printing my own labels w/barcodes because some of our events mailings are really weird looking. Anyways, I understand the 3 of 9 barcode is supposed to be enclosed in asterisks and the last digit is the checksum (mod 10) but what about the address barcode. I see that the address barcode holds the zip, DPC and a checksum but I can't tell how it's calculated. Is it mod 10 also? Dan Larson Programmer Saint Cloud, Minnesota To me, it's a good idea to always carry two sacks of something when you walk around. That way, if anybody says, "Hey, can you give me a hand?" you can say, "Sorry, got these sacks." ~Jack Handy