To save me a lot of typing...Check out this website.

http://www.mentalis.org/agnet/apiguide.shtml

Download the following files and install them into your computer. You will find them very very helpfull:

API-Guide
API-Viewer
API-List

(download links are located on the left sidebar In the webpage)

API-Guide gives you explainations to what all the API functions are for, parameter explainations, and lots of samples as to how to use each API function. Happy programming....