try
=sum(sheetfirst:sheetlast!af100)
where they fill in the name of the 1st and last sheet

--
Don Guillett
SalesAid Software

"Brad K." wrote in message
...
I have a workbook that will be used by several others. I need to find a
way
to get totals from each sheet and add them together on the "Overview"
sheet.
For example, on Overview sheet Cell C5 might have
='Account1!AF100+'Account2'!AF100+'Account3'!AF100 +'Account4'!AF100

The issue I am having is that each user of this sheet will have a
different
number of "Account?" sheets and there will be no naming consistancy as
they
would put the actual account name for the sheet name.

Is there a way to simply do this or else what is the best programatically
way to accomplish this?

Thanks,
BradK