Firstly, make sure you update your video drivers. That is where the new OpenGL code sits. Then you need to go to the following site and download the new header files: http://www.opengl.org/registry/

For details on what is going on, have a read through: http://sites.google....2---tutorial-01

My graphic card supported up to OpenGL 3.2 (100%). I decided working with that version. I found a new thing. This is:
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I am using windows 7 - 32 bit and visual studio 2008. On windows 7, gl.h and glu.h are version 1.1 . Thus, how can I code with version 3.2?

Unless you're going to do things manually, you need some kind of extension loading library like GLEW or Gl3w. If you're going to use OpenGL 3.2, then NeHe tutorials aren't going to help you much unless you're planning on staying backwards compatible. See http://www.opengl.or...ity_in_Contexts The Superbible 5th edition teaches core OpenGL 3.2 though it does so through the author's personal library. He does provide the source code for it so you can still learn the GL functions. Like anything else, some people like it and some people don't.