If your goal is to develop games then you're going to need a serious grasp for C++ or C to begin with.
Then you will need some Win32 API knowledge for basics like creating windows and such.
You will also need to learn a graphics library API such as DirectX or OpenGL.
To go along with that you're going to need to be competent with mathematics such as trigonometry.
I suggest getting some books and online tutorials and getting stuck into writing programs. Stick with it. That's the key!