OpenGL is graphic library for cross platform 3D graphics. This is same as Direct3D in directx library. There are many tutorials and example videos to learn OpenGL. In this post I am trying to make a short note to cover up most import points, I have learnt.
Glut is tool for creating windows and handling inputs. Use FreeGlut pre build libs for your projects.
This is openGL extension manager and lat us easily call openGL extensions without having declare DLL entry points.