validation and other question

viper

Active Member
Joined
Feb 15, 2002
Messages
382
I'm looking for some way to tell if an invoice has already been input. I have a spreadsheet with 8 pages where we input our invoices. I need to prevent a duplicate entry with a msgbox warning. I have tried using data validation on a previous spreadsheet but that didn't produce the results I wanted. We input the invoice number in C9:C38, on all eight pages. If a duplicate entry is made I need to notify the user of the fact.

Sorry the other question I will work on first before I ask for help.

Thanks,
 

Excel Facts

Which came first: VisiCalc or Lotus 1-2-3?
Dan Bricklin and Bob Frankston debuted VisiCalc in 1979 as a Visible Calculator. Lotus 1-2-3 debuted in the early 1980's, from Mitch Kapor.

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