C++ .NET Programming - How To Draw 2D Objects (Circle, Rectangle, etc) on Windows Forms Application

First of all, I'd like to present my first tutorial about  C++ / CLI CLR .NET Programming. This time it's about Graphical User Interface in C++ .NET (in this case, i don't want to use native C++, because it's so annoying -_-). Okay, I assume that you have a little knowledge about C++ .NET GUI (Don't