Used by
CADGetLineTypeIDs, CADGetLineTypeDefinition,
CADGetDefaults, CADSetDefaults,
CADAddLine, CADAddSquare, CADAddRectangle, CADAddPolyLine,
CADAddCircle, CADAddCircleArc, CADAddEllipse, CADAddEllipseArc,
CADObjLine, CADObjSquare, CADObjRectangle, CADObjPolyLine,
CADObjCircle, CADObjCircleArc, CADObjEllipse, CADObjEllipseArc,
CADGetLineType and CADSetLineType.