Creating app to add massage in user's stream

Hello,

I have to create app which will push different massages on user stream / wall.
Different messages like -
1. when store owner add newly product in his store - Product information will be post on his wall .
such type of massage has to push in stream.

I have checked tutorial on site http://docs.stackideas.com/developers/Applications/Application_Methods to create a app. But doc is not updated..

Please suggest me how could i do this? Please reply me as soon as possible (Stuck in developement).


Thank you in advance