You can simply use ODBC to read data from excel to datatable.

An easy way is to use FileHelpers. Check site www.filehelpers.com[^] Excellence is doing ordinary things extraordinarily well.

Check out this code project article[^]. It's a base conversion class. If you convert base 26 (letters A-Z) to base-10, increment the converted value, and then convert it back to base-26, you'll have your answer. "Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997 ----- "...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001