Little Help im kinda Stuck

Hello im making a SMS program because i hate having to go to the websites and doing 10 steps when i could do one step.
im stuck on Cingular's SMS System i dont know what or how they are passing the Var to their system can someone help me find out what url and Var's to pass ??

SMS? makes as much sense as http://www.geocities.com/gman67210/g001.html

Well i like Text Messaging fun when your in class and cant talk so a little help would be nice