AFAIK there is no limit on number active apps, using Direct3D, in XP. Of course you can have only ONE app requiring exclusive mode at a time.Originally Posted by tux
Windows Vista of the other side has new driver model and part of this model is: specification for new (fully WGF2.0 compatible HW) to allow preemptive multitasking build in HW. This way multiple apps using D3D (including Windows build-in 3D desktop manager) will not constantly fight for HW 3D engine how this happens in WinXP.
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