Example 
ForceStallUntilGPUIsIdle Property (VisualXcceleratorRenderSurface)
When false (default), there is no waiting for the gpu to finish rendering, and the frame buffer is copied immediately when true, we force the application to stall until the gpu is idle, this fixes flicker issues that can happen on older hardware
Syntax
public static bool ForceStallUntilGPUIsIdle {get; set;}
Example
To enable waiting for gpu to finish
void Foo()
{
   Viewport3D.ForceStallUntilGPUIsIdle = true;
}
Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also