Forbid client to see server's 2nd screen (expanded desktop)

[w-sky]

Hi there,

I am using UltraVNC at a school, and one of its purposes is for presentation to all 15 screens in the computer room. The viewer is always running on the pupil's computers in listen mode with options fullscreen and view only, and to start a presentation, I am using the great VNC Control.

But now the problem. The teacher's computer has 2 monitors, the Windows desktop is expanded to both screens. When I start a presentation, the pupils see the main screen, but if they move around their mouse and touch the right border of the screen, the display moves to the 2nd screen..... that's a pretty cool feature, but in this case, I'd like to turn it off.
Is it possible?

[bevtech]

VNC control is a vnc related product.. So you may need to contact them for a solution..

[w-sky]

Oh wait, but it's the same if I use the UltraVNC controls (menu of WinVNC systray icon)!

I shouldn't have mentioned VNC Control necessarily, it's just a kind of easy-to-use interface for UltraVNC which makes handling of many computers much easier.