Best way to secure VBA

I am working with an application that has some VBA projects embedded (not excell, actually and industrial HumanMachineInterface program). Any the manufacturer has some VBA projects embedded into it that are protected by being "hidden". I see the title but when I try to expand the project I get a msgbox saing "project is unviewable" with a titlebar reading "Project locked". Right clicking does not even give me the option to unhide it or enter a password to unlock or view.

Question 1. Has anyone seen this before? it seems way better than password protecting the VBA project and I would love to do this to my projects in this application

Question 2. Has anyone done this before? And if so can you tell me how?

Thanks in advance!
Randy

It project protection. Under the VBA IDE you would click - Tools > Project Properties > Protection tab > check the box for "Lock project for viewing" > then enter in a password and enter in confirm password > click OK. Close your instance of your app, reopen, press Alt+F11 to open the VBA IDE, click on the project node to expand and view and you will get the same protection.

Then to view it enter in the password in the popup dialog box and it will open.

What app are you using?