This post will share my discovery on all functions named as wglxxxx in header file. Surprisingly, I found the complete list of these WGL functions[3] in header file. A Question When we adventure into OpenGL land, as Microsoft developers, we will run into a natural question: how can we use our MFC & Win32 skillsets? With the help of WGL functions(Wrangler library), through framebuffer, we can hangle Win32/MFC windows onto OpenGL layer. Here is my understanding of complete process flow.