CAD参数绘制标记（com接口）

C#中实现代码说明：

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private void DrawFlag(object sender, EventArgs e) {     MxDrawResbuf param;     param = new MxDrawResbuf();     MxDrawPoint point;     point = new MxDrawPoint();        point.x = 100;     point.y = 100;        param.AddPoint(point);        MxDrawResbuf ret;        ret = (MxDrawResbuf)axMxDrawX1.CallEx("ExApp_AddFlag", param);        MessageBox.Show(ret.AtLong(1).ToString()); }

效果展示：