CContainedWindow in C#

As always, when you need to implement something from C++ in C# you have some ways of doing it, but they all are not very good. So, may be you do not need it? I didn't work with CContainedWindow class in c++, but I don't understand why do you need it in c#... UserControl creating system is rather good... I recommend you to read basis of migrating classes from c++ to c#, or may be just create assembly in c++, containing this class and add this assembly into your c# project.

If you have a question instead of a riddle maybe someone could help you further!!!