You're better off asking these questions in the forums really...

In answer to your questions :

(1) "public class" means that the class is accesible from outside the assembly. "internal class" means the class is only accessible from inside the current assembly. In executables it doesn't have much meaning.

(2) System.Windows.Forms.Control is the name of the class including the namespace. You have namespaces in C++ seperated using :: - e.g. std::vector. In C# a period (full stop) is used.

(3) Managed C++ can use class libraries (dlls) written in C# by the #using directive - sort of like #include only for class libraries. C# can use managed C++ assemblies by adding them as references to the project.

(4) You can't mix up C# with C++ in one assembly.

Any more questions like this should be put to the C# forum.

Darwen.