(1) CFile( );
(2) CFile( LPCTSTR lpszFileName, UINT nOpenFlags );  throw( CFileException );


lpszFileName
	ļ

nOpenFlags 
	CFile::modeCreate һļ򿪣ļѴڣԭݱ
	CFile::modeRead   ļ
	CFile::modeReadWriteļ/д
	CFile::modeWrite  ļд
	CFile::typeText   ıļģʽֻУ
	CFile::typeBinary öļģʽֻУ
