WGL_I3D_swap_frame_usage
http://oss.sgi.com/projects/ogl-sample/registry/I3D/wgl_swap_frame_usage.txt
	BOOL wglBeginFrameTrackingI3D (void)
	BOOL wglEndFrameTrackingI3D (void)
	BOOL wglGetFrameUsageI3D (float* pUsage)
	BOOL wglQueryFrameTrackingI3D (DWORD* pFrameCount, DWORD *pMissedFrames, float *pLastMissedUsage)