The only secure way is to create it as a VB DLL, but that requires a full
version of VB, and is much more work.

Oh, there is also XLL, but I have never used these so I cannot comment on
what is required, how difficult it is, or how secure.

--

HTH

Bob Phillips
... looking out across Poole Harbour to the Purbecks
(remove nothere from the email address if mailing direct)

"Jeff" wrote in message
...
I want to build an add-in and distribute it, but would like to secure it
as
much as possible. From other comments it is obvious that just putting a
password on the project is not very secure.

Does anyone have any suggestions.

Jeff