IF contains over multiple worksheets
 

This may be difficult to put into words, but I'm sure going to try!

I have two spreadsheets: one with Compensation Information and the other is
an Attendance spreadsheet.

I want the spreadsheet with Compensation information to calculate total Paid
Vacation based on the following criteria:

IF Cell C3 in Attendance - 2004.xls contains the same data as Cell C3 in
Total Comp Report.xls, then I want it to calculate Attendance - 2004.xls Cell
H6* Total Comp Report.xls Cell H2.

Is this remotely possible?