读写excel的这段代码为什么会有问题

一颗菜

CString strconnectionstring("Provider = Microsoft.Jet.OLEDB.4.0; Data Source =G:\\ugkaifa\\data\\13.xls"); /*Extended Properties = \"Excel 8.0;HDR=No;IMEX=1\"");*/

try
{
  pConnection->Open((_bstr_t)strconnectionstring, " ", " ", adModeUnknown);
  MessageBox(NULL, _T("连接数据库成功"), _T("提示"), MB_OK | MB_ICONINFORMATION);
}
catch (_com_error e)
{
  MessageBox(NULL, _T("数据库连接失败"), _T("错误"), MB_OK | MB_ICONERROR);
}

法规的规定非

我做这个是看的这篇博客
http://www.cnblogs.com/tianya2543/p/4165997.html