Using Flash Components with PHP

Im new to using php with flash, and was wondering how you get, say, a checkbox component to post variables to your php script - it seems pretty easy to send text via an input textbox ( usings the vars bit in the properties ) but the components don’t have a ‘vars’ bit!? They have parameters that tell you true or false - how do you send that to your php script ( so that it emails you with the info ) ?

ps - I know how to do the php script to get basic text from flash to send back to my email ( although at the moment it is sending all the font formatting as well!!! )

but I can’t even see HOW you can send the CHECKBOX info to the php script