JW69,

A simple way would be to use something like this, you could assign it to a
button, an open or before print event.
Sheets("Sheet1").Range("A1").Value = _
Sheets("Sheet1").Range("A1").Value + 1

BUT, if you did save it as a temple, as you said, that want work, have a
look here for ways to do it
http://www.mcgimpsey.com/excel/udfs/sequentialnums.html


--
Paul B
Always backup your data before trying something new
Please post any response to the newsgroups so others can benefit from it
Feedback on answers is always appreciated!
Using Excel 2002 & 2003

"JW69" wrote in message
...
I have a template of an invoice (in excel) but I need it to automatically
generate a different invoice number every time I open it. Such as 001 the
1st time, 002 the 2nd time etc.

I have no knowledge of macros & do not want to uses Acess.