This problem should be pretty common so hopefully someone can fire the answer I seek straight away.
I made a few C++ classes in the regular "myClass.h" + "myClass.cpp" manner. Naturally I collected the classes in a folder, now I want to pretend that this is a valid "library" and want to include the path to this folder in Visual Studio. .cpp and .h files are at the same location, if I add the path to that folder in "Project Settings -> C/C++ -> General -> Additional Include directories" it does not complain about the "#include "path/to/myClass.h" , however it throws a Linker error when I attempt to build (also "Go to Definition on mouse Context fails or takes me to the header").
I don't know how or what those ".dll" libraries are and hopefully I can get away without building any.