I complete the wish :
It seems that it is possible to have two different displays on the two screens.
I'm very interrested in such a library because I write a scoring application wich displays some views in a right zone and other views in a left zone.
When the referree is in front of the external monitor, i want just the normal duplication of the tablet screen to the monitor.
When the referree is behind the external monitor, i want he can choose an reverse mode where the application displays the views of the right zone at the left and the views of left zone at the right.
If someone can write this library, I can help to test and debug it.