the DX11 renderer in fullscreen-mode allows the windows 8 charms bar to appear with touch input. this is quite a killer for kiosk-type touch applications (as you can access the start menu, …).
what are the options to avoid this situation? (EX9 renderer does not show this behaviour btw…)
For me, Woeis solution works without noticable performance drawbacks. It also fixes a stupid Vsync-Problem that I have on a dualscreen-Setup with DX11-Renderer in Fullscreen!
(I know, this seems to be a Windows-Problem, but having DX9 in Fullscreen fixed the Vsync, so no tearing in animations anymore) :)