static void swtArxProject5createLine(void)
    {
        // Add your code for command swtArxProject5.createLine here
        //创建新的CAD数据库
        AcDbDatabase *pDb=new AcDbDatabase();
        //定义块表指针
        AcDbBlockTable *pBlkTbl;
        //获取块表
        pDb->getSymbolTable(pBlkTbl,AcDb::kForRead);
        //定义块表记录
        AcDbBlockTableRecord *pBlkTblRcd;
        //获取块表记录
        pBlkTbl->getAt(ACDB_MODEL_SPACE,pBlkTblRcd,kForWrite);
        //关闭块表
        pBlkTbl->close();
        //定义点
        AcGePoint3d pt(10,10,0);
        AcGePoint3d pt1(20,10,0);
        //定义线指针并创建线
        AcDbLine *pLine=new AcDbLine(pt,pt1);
        //将线添加到块表记录中
        pBlkTblRcd->appendAcDbEntity(pLine);
        //关闭线和块表记录
        pLine->close();
        pBlkTblRcd->close();
        //将图形另存
        pDb->saveAs(_T("c:/TEST.DWG"));
        //删除图形数据库指针
        delete pDb;

    }