LD SDK LDCControlDll 中 CXMLFile的进一步使用方法，建议以后改进

 1、遍历子节点
                DWORD dRes;
                if ( 0 == (dRes=xmloper.selectFirstChildNode()) )
                {
                 // nodetxt = "Programe"
                 while (0==dRes)
                 {
                  CString strProg;
                  xmloper.readNodeValue(strProg);
                  
                  CDocument *pDoc = this->OpenDocumentFile(strProg);
                  dRes = xmloper.selectNextNode();
                 }
                 xmloper.selectParentNode();
                }
                
              2、获取节点ID
                xmloper.readNodeAttribute(_T("ID"), strID);
                nScreenID = _ttoi(strID);

              3、添加子节点属性操作,                   
              4、在子节点查找,   
                // !!在一组节点中找到符合条件的节点,并得到他的ID
                xmloper.selectRootNode();
                xmloper.selectNode(_T("/Root/ScreenProgrames"), 2);
                DWORD dRes;
                if ( 0 == (dRes=xmloper.selectFirstChildNode()) )
                {
                 // nodetxt = "Programe"
                 while (0==dRes)
                 {
                  CString strProg;
                  xmloper.readNodeValue(strProg);
                  if (0==strProg.Compare(lpszPathName))!!!
                  {
                   xmloper.readNodeAttribute(_T("ID"), strID);
                   nScreenID = _ttoi(strID);
                   break;
                  }
                  
                 ` dRes = xmloper.selectNextNode();
                 }
                 xmloper.selectParentNode();
                }