directory accesable for multiple computers

Hi Guys,

For my application i'm using an excel sheet, which calculates someone's total expenditure.

The values from this excel sheet im importing it into my vb.net application.
Now im using the filename:

This filename is adjusted for my pc. But i would like to use my application on more computers.
Does anyone know a solution to make the filename more accesable for multiple computers?

Thanks in advance