>Before I ask for this file, I want to know something important; does it come with money back guarantee? :)

No guaranties whatsoever. Use on your own risk.

>Seriously though; I have not read the entire thread so forgive me if my question has been answered. Does your code report if the file in open only with VFP USE command? or will it work if the file is open with FOPEN() too?

It's not my code rather adaption of the one referenced elsewhere in the thread. It does report if file is used (open) in any way on a share.
Also it's a "quick and dirty" tool to check files in use. It's in no way complete or can be used in an application w/o cleanup and adaptation.