Protect Excel File From Opening Only In Designated Computers

Hi, to try and stop copying and using my files I wondered if there is a way to protect my excel files to open only on designated computers. doesnt really matter if they are copied but they wont be able to use it as it would be assigned to another computer name.

Thanks

Mike

Hi everyone

I apologise perhaps I should introduce myself before posting. I found Excelfox when Rick Rothstein answered a post of mine on MrExcel. I was impressed with his response enough to register here too. I am an intermediate user of excel and look forward to many interesting posts and reading here.

Thanks
Mike