How can I make ue4 module with my raw c++ source code(not generated by ue4)

how can I make ue4 module with my raw c++ source code(not generated by ue4)
I want to make new module that is used in main module

my source code is like this

class MyWebClass
{
   public:
      MyWebClass();
      ~MyWebClass();
      bool connect(const EndPoint&);
}
....
....

I succeed to make module with my code and succeed to compile module
but when I try to use this module in main module, it can’t find symbol (link error // header include is ok)
how can I do?