Private Sub InsertBlock_Click()

            '把颜色改回黑白色
            MxDrawX1.DrawColor = 0

            '创建一个图层,名为"BlockLayer"
            MxDrawX1.AddLayer "BlockLayer"

            '设置当前图层为"BlockLayer"
            MxDrawX1.LayerName = "BlockLayer"

            '
            MxDrawX1.InsertBlock MxDrawX1.GetOcxAppPath + "Blk树.dwg", "TestTree"
            MxDrawX1.DrawBlockReference 0, 3600, "TestTree", 1, 0

            MxDrawX1.ZoomAll

            MxDrawX1.UpdateDisplay

            End Sub

        private void InsertBlock()
        {
            // 插入块的块名。
            String sBlkName = "MyBlkName";

            // 把要插入的块文件引入到控件数据库中。

            axMxDrawX1.InsertBlock("DwgFile", sBlkName);

            // 取到控件数据库

            MxDrawDatabase database = (MxDrawDatabase)(axMxDrawX1.GetDatabase());

            // 得到块表对象
            MxDrawBlockTable blkTable = database.GetBlockTable();

            // 当前块表中是否已经有名为sBlkName的块表记录

            MxDrawBlockTableRecord blkRec = blkTable.GetAt(sBlkName, true);
            if (blkRec == null)
            {
                // 证明InsertBlock函数失败，没有成功把文件插入数据库中。

                return;
            }

            //
            // 创建一个用于遍历块表遍历器
            MxDrawBlockTableRecordIterator iter = blkRec.NewIterator();
            if (iter == null)
                return;

            for (; !iter.Done(); iter.Step(true, false))
            {
                // 得到遍历器当前的实体
                MxDrawEntity ent = iter.GetEntity();
                if (ent == null)
                    continue;

                if (ent is MxDrawText)
                {
                    // 当前实体是一个文字
                    MxDrawText text = (MxDrawText)ent;

                    // 修改文字内容为 "MyContent"
                    text.TextString = "MyContent";
                }
            }

            // 创建块引用，把图块插入到当前空间，并显示。
            axMxDrawX1.DrawBlockReference(0, 0, sBlkName, 1.0, 0.0);
        }

     axMxDrawX1.InsertBlock("H:\juxing.DXF", "junxing");
     MxDrawDatabase database = (MxDrawDatabase)axMxDrawX1.GetDatabase();
     MxDrawBlockTable blkTab =  database.GetBlockTable();

     MxDrawBlockTableRecord rec = blkTab.GetAt("junxing");
     if (rec == null)
         return;

     MxDrawBlockTableRecordIterator iter = rec.NewIterator();

     double dMinX = 0, dMinY = 0;
     bool isSet = false;
     for (; !iter.Done(); iter.Step())
     {
         MxDrawEntity  ent = iter.GetEntity();
         MxDrawPoint pt1, pt2;
         ent.GetBoundingBox(out pt1,out pt2);

         if (pt1 == null)
             continue;

         if (isSet)
         {

             if (dMinX > pt1.x)
                 dMinX = pt1.x;

             if (dMinY > pt1.y)
                 dMinY = pt1.y;

         }
         else
         {

             dMinX = pt1.x;
             dMinY = pt1.y;
             isSet = true;
         }


     }
     if (isSet)
     {
         MxDrawPoint pt = new MxDrawPoint();
         pt.x = dMinX;
         pt.y = dMinY;
         rec.Origin = pt;

     }
     axMxDrawX1.DrawBlockReference(0, 0, "junxing", 1, 0);
     axMxDrawX1.ZoomAll();

            qlonglong nId = pMxDrawX->DrawBlockReference(pBlock->ptIns[0], pBlock->ptIns[1], pBlock->strBlockTypeName, pBlock->dScale[0], pBlock->dAngle*180.0/osg::PI);
            IDatabase *database = (IDatabase *)pMxDrawX->querySubObject("GetDatabase()");
            IBlockRef * pBlkRef = (IBlockRef * ) database->querySubObject("ObjectIdToObject(qlonglong)",nId);
            IMxDrawBlockReference * pBlkRef = (IMxDrawBlockReference * ) database->querySubObject("ObjectIdToObject(qlonglong)",nId);