Shoutbox

Hi, I saw in this code (Quick Contact Adder) by deAD he uses the API to open the add contact window.

Can someone tell me how to code so that it presses the ok button automatically? I am new to API coding so am not sure what to look for in the documentation or on the web. I have looked in the forums as well. Thanks. Or can you link me to relevant documentation/tutorials? I would be very grateful.