I was going through this tutorial (http://www.masteringapi.com/tutorials/how-to-post-a-message-on-the-user-wall-using-facebook-graph-api/33/) and was trying to figure out how do I post a message on my friend's wall using the FB Graph API.
I was able to post messages for friends who have authorized my App (clicked on teh ALLOW button of my app) but I am not able to post on my friend's wall who have NOT allowed my app.
So my questions are:
1) Is it possible to post a message on a friend's wall who have not authorized my app?
2) If yes, how do I do this?
3) If no, then is there any alternate way? Actually I am trying to implement a feature in my application that will allow the users to invite their friends.