There are numerous ways to do what you want, all of which can be broken by
anyone with sufficient knowledge of Excel. Otto
"Mr BT" wrote in message
news:nObvi.50061$fJ5.26043@pd7urf1no...
Like some software out there are demos and run out after 60 or so many
days unless they have some code to keep it going, can it be done with an
Excel workbook?
I want my workbook to be used for so many days and then they will have to
upgrade to the next version. I'm not charging the users anything to use
the workbook, but my employers are not paying me for something I've done
on my own time.

Thanks,

Mr BT