Hi Sean
Use this
http://www.cpearson.com/excel/NoDupEntry.htm
--
Regards Ron de Bruin
http://www.rondebruin.nl
"Sean" wrote in message ...
I assume this is done through validation I just dont know how?
I have column B rows 1 to 500. I enter customer order numbers in on a daily
basis, I want it to error out if I attempt to enter the same order more than
once.
For instance if I am on row 400 and I try typeing in order 123456 and it
exists on row 286 it warns me or alerts me that it was already used?
Any Ideas Would Be Great... Thanks...
Sean