Keeping add-in private

[R Avery]

I have an Excel .xla add-in that I wish to protect to ensure that no one
can look at what is inside its sheets or the VBProject associated with it.

I can password protect the VBA code easy enough, but how do I stop users
from doing things like
application.workbooks("MyAddin.xla").isaddin=false, and looking at the
sheets?

 

[Tom Ogilvy]

hide the sheets and protect the structure of the workbook with a password
(workbook level protection)

However, password protection in Excel is notoriously weak.