Windows

Considering you are posting in For Beginners, I don't think anyone would expect you to know how to make a window from scratch. You should, however, take the time to try to understand the steps that the code you use to create the window does. Ex: try to understand what the different member variables of the WNDCLASS/WNDCLASSEX do.

Ok. Thank you.

Depends on what you want to do.

You can use MFC for instance to create windows. This will simplify things and is good for beginners. In .net there is a similar framework.

Or you can use the CreateWindow function. This is what windows OS provides to create a window. MFC will use that function in the end.

Or you can use a GUI framework like Qt. This will provide you with a platform independent way of generating GUI applications.

Or use instead of MFC, Windows Forms from managed C++, they combine advantages of GUI creation of C# and C++ OOP(that i personally like more than C# OOP)