Cannot declare a variable with public access in a class from a module

Question

I am making a GUI based application (forms), and encountered the following error.

Firstly, I am declaring the following stuff in a module

Module test_mod         


        

Answer 1

By default modules and classes are Friend (only visible to your assembly).

Your form, however, is explicitly Public, which exposes it and its members to the world - which extends test_mod.main_struct's visibility.

Declare your module as Public too.