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dialog1 * m_h = new dialog1();

      m_h->Create(IDD_DIALOG1);

      m_h->ShowWindow(true);  

     CSzwpc m_pc;

     CFileDialog FileDlg(TRUE,NULL,"*.txt",OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT,

         "水准网平差数据文件(*.txt)|*.txt|allfile(*.*)|*.*||");

     FileDlg.m_ofn.lpstrTitle="打开平差文件";

     if(FileDlg.DoModal()==IDOK)

     {

         CString StrFile=FileDlg.GetPathName();

         if(m_pc.ReadData(StrFile))

         {

              m_pc.pc();

              m_pc.WriteData(StrFile);

              AfxMessageBox("读xie完了");

         }

     }