Actually, I discovered the link I posted earlier doesn’twork for people except me. So, I created a test page:
http://crealya.fr/wlwtb/test1/messengerbar.php
It dontains the Messenger Bar. I only tried it in Chrome. You click the “Sign In” button at the bottom right. In the window which opens, you also click the “Sign In” button. The page will reload and the bar will appear with a user logged in.
WORK 1: If someone knows how to refresh the bar after the sign in completed instead of reloading the whole page.
WORK 2: If someone understand (thanks to the preivous information) why the iframe doesn’t do anything with the message it receives…