>Can someone tell me how to protect a class so it cannot be changed? I'm

after you write it and compile it; you can use it (use myclass.vcx) and
replace all the methods with ""

HOWEVER, it can still be accessed if someone has a decompiler.

You can compile it an app and brand it; and then issues
set class to in myapp.app

I haven't tested the app thing; but it should work.