Similar to my last post, I want to be able to change a parameter
within a calculation.

I have tried to modify code that I used for a similar event from
before but I am stumped.

The code is as follows: -

Dim extract As String
ActiveCell.FormulaR1C1 = _
extract = InputBox("Please enter Version Control Master file", "File
Name")
ActiveCell.FormulaR1C1 = _
"=+'[& extract &]Static Summary'!R9C3-'[Version Control Master
20070815.xls]Static Summary'R9C3"

Basically I am calling cell C9 from one sheet whose name changes daily
and subtracting the value in C9 on the other sheet which does not
change.

Responses/guidance gratefully received.
Thank you

Mark