Graphics.Rendering.OpenGL.Raw.ARB.OcclusionQuery
glGenQueries
glDeleteQueries
glIsQuery
glBeginQuery
glEndQuery
glGetQueryiv
glGetQueryObjectiv
glGetQueryObjectuiv
gl_SAMPLES_PASSED
gl_QUERY_COUNTER_BITS
gl_CURRENT_QUERY
gl_QUERY_RESULT
gl_QUERY_RESULT_AVAILABLE