Problem opening file name

[Alpacino]

I have tried and tried but no success

I have this macro code
Wb = workbook.Open(C:/workfiles/expenses/week9.xls")

I would like the end bit the file name e.g. week9.xls to be value from worksheet cell A3 how do I rewrite code to be able to take value from cell A3 to be in code.
E.g if A3 value is week10 the line will be
Wb = workbook.open(C:/workfiles:expenses/week10.xls")

Anyone help please
Thanks

 

[njimack]

Try this:
Wb = workbook.open "C:/workfiles:expenses/" & Sheets("Sheet1").Range("A3").Value