Cocoa Touch - Send Messages to Xbox 360 Friends

For my n开发者_如何转开发ew app Im working on I want to be able to send messages on the app to xbox 360 friends . I Know its possible since they have them on the app store but how would I do it?

Thanks for any ideas/code!

Figure out what protocols are involved, learn to implement them or if they're existing (I honestly don't know) then use facilities already built in to communicate with a service which provides this.

You should do this, after this, you will have a better understanding of what needs to happen.