The best you can do in my opinion is to save the workbook in Excel with a
password (File, Save As, Tools, General Options, Password to Open). If you
pick a long, nonsense password (not a word) it would be very difficult to
hack. Of course once someone bought the password he could save the workbook
without the password and give it away.

Any kind of macro based 'protection' is much easier to get around by
comparison.

--
Jim
"Aaron" wrote in message
...
| Hello,
|
| I am wanting to disseminate a workbook for sale. Does anyone have any
| suggestions on how to secure it so that it cannot be used unless it has
been
| paid for. At the very least, could I have a disclaimer popup on the open
| event that says it's illegal to copy or use this workbook without license?
| Thanks for any suggestions