I want to place a button where the User can send a stream to facebook. If the user clicked the button, I want to check if the user is already logged in or if he should login. That's no problem.
What I can't do is to show the the login screen the user is not already logged in. So the User don't have to press another button to login.
Is this possible?
look at the kitchensink facebook sample. That code does exactly what you want to do.