With Bob Phillips help I can create a variable filename. The filename is
contained in a cell called Filename_Finance. When I try to activate the
window I can't make it work. I've tried the following code:

Windows.Range("Filename_Finance").Activate
Windows(Range("Filename_Finance")).Activate
Workbooks.Range("Filename_Finance").Activate
Workbooks(Range("Filename_Finance")).Activate

but none of these work. When using the workbooks option I was mindful to add
the .xls.

Can someone help please?