With XP I could plug a projector into the laptop VGA connection, right click on the screen and use settings to extend the desk top to the projector, the same as I could with a second monitor.
With Win 7 I can still extend my desktop to a monitor, with essentially similar steps.
However when I try to do the same with a projector I don't get and "extend" option, only choices between the laptop screen, the projector or a duplicate of the laptop screen on the projector.
How can I extend to a projector? In this case a BENQ.
We replaced the win 7 notebook with one running XP and had an extended desktop straight away. Just had to install the software and data on that one as well.