Graphics.Rendering.OpenGL.Raw.NV.OcclusionQuery
gl_CURRENT_OCCLUSION_QUERY_ID_NV
gl_PIXEL_COUNTER_BITS_NV
gl_PIXEL_COUNT_AVAILABLE_NV
gl_PIXEL_COUNT_NV
glBeginOcclusionQueryNV
glDeleteOcclusionQueriesNV
glEndOcclusionQueryNV
glGenOcclusionQueriesNV
glGetOcclusionQueryivNV
glGetOcclusionQueryuivNV
glIsOcclusionQueryNV