From where to download OpenGL 1.2

OpenGL OpenGL: Basic Coding
1

Hi,
From where can I download OpenGl 1.2 ?
Please help me.
Thankx in anticipation.

2

For which OS?

3

And for what video hardware… ?

4

I need openGL 1.2 for windows 2000 and for Wildcat II 5112.
Thankx