查找图上文字，找到文字内空为"AAA"的文字，并把文字放到视区中间，使用标记圆标出.

• 回答：

          IMxDrawSelectionSetPtr ss;
          ss.CreateInstance(__uuidof( MxDrawXLib::MxDrawSelectionSet ));
  
          IMxDrawResbufPtr spFilte;
          spFilte.CreateInstance(__uuidof( MxDrawXLib::MxDrawResbuf ));        // 把文字对象，当着过滤条件.
          spFilte->AddStringEx("TEXT",5020);        // 得到图上，所有文字对象.
          ss->Select(mcSelectionSetAll,NULL,NULL,spFilte);        // 遍历每个文字.
          for(long i = 0; i < ss->Count;i++)
          {
              IMxDrawEntityPtr ent = ss->Item(i);            if(ent == NULL)                continue;
              IMxDrawTextPtr spTxt;
              ent->QueryInterface(&spTxt);            if(spTxt == NULL)                continue;
  
              CString sTxt = spTxt->TextString;            if(sTxt == "AAA")
              {                // 把文字放到视区中间.
                  m_ocx.PutEntityInView(spTxt->ObjectID,300);                double dLen = m_ocx.ViewLongToDocCoord(80);                // 绘制一个标记圆.
                  m_ocx.DrawVectorCircle(spTxt->Position->x,
                      spTxt->Position->y,
                      dLen, 65280);
  
      
              }
  
          }