Hi Bill, I got the answer to my question many months ago from Sergey. Looks like you are experiencing a CodeMine (cm) related error as cmregsetinteger.prg must be CodeMine specific.

>Hi Tom
>I tried out "your" FoxCrypto.fll routine for encrypting data and your sample "Test" worked fine in a button on a form.
>However, when I went to close the system I got the following error:
>Error# 1. "File 'cmregsetinteger.prg' does not exist. (from RemoveToolBar line 19)
>
>Am using VFP 7.1, WindowsXP, and CodeMine 7.1.
>All help appreciated.
>Bill