public static extern SUGuidePointRef SUGuidePointCreate(ref SUGuidePointRef guide_point, ref SUPoint3D position);
public static extern SUDrawingElementRef SUGuidePointToDrawingElement(SUGuidePointRef guide_point);
public static extern SUEntityRef SUGuidePointToEntity(SUGuidePointRef guide_point);
public static extern SU_RESULT SUGuidePointGetDisplayAsLine(SUGuidePointRef guide_point, ref bool as_line);
public static extern SU_RESULT SUGuidePointGetFromPosition(SUGuidePointRef guide_point, ref SUPoint3D position);
public static extern SU_RESULT SUGuidePointRelease(ref SUGuidePointRef guide_point);