Per-pixel lighting

I would like to use per-pixel lighting in a project, and I heard I can use it via extension. Could someone tell me which is the extension I need (for a GeForce3) and also if I will need to program low level the pixel shaders of the GF. Thanks.

Go to NVIDIA 's developer site. They have all the information you ever need to use their products.

I found the site and it seems they really have all. Thank you.