enum
{
	m_enumBeg = 0,
	m_enumCur,
	m_enumEnd
};

BOOL OpenFileWriteLine(CString szStr,CString szFilePath="",int szFileFlag=m_enumEnd);

BOOL CSearchEx::OpenFileWriteLine(CString szStr,CString szFilePath,int szFileFlag)
{
   if (szFilePath.IsEmpty())
   {
	   CFileDialog m_tDlg(TRUE,"*.*","*.*");
	   m_tDlg.DoModal();
	   CString m_tPath=m_tDlg.GetPathName();
		if(m_tPath.IsEmpty())
			return FALSE;
	     m_ofstream.open(m_tPath.GetBuffer(MAX_PATH));
	
   }
   m_ofstream.open(szFilePath.GetBuffer(MAX_PATH));
 if (szFileFlag==m_enumBeg)
  {
	  m_ofstream.seekp(0,ios::beg);
  }
   else if (szFileFlag==m_enumCur)
   {
	   m_ofstream.seekp(0,ios::cur);
   }
   else if (szFileFlag==m_enumEnd)
   {
       m_ofstream.seekp(0,ios::end);
   }
  if(m_ofstream.is_open())
  {
    m_ofstream.write(szStr.LockBuffer(),szStr.GetLength());
	m_ofstream.write("/r/n",2);
   szStr.UnlockBuffer();
	return  TRUE;
  }
    m_ofstream.close();
    return FALSE;
}


CSearchEx m_tSearch;
m_tSearch.OpenFileWriteLine(CString("TEST"));

[课程]Android-CTF解题方法汇总！