
virtual LONG CFile::Seek(LONG lOff, UINT nFrom); throw(CFileException);

ֵҪλúϷSeekشļʼֽƫֵδ壬CFileException쳣

lOffλָƶֽ
nFromλָƶĲյ
	CFile::beginļʼָƶlOffֽڡ
	CFile::currentӵǰλÿʼָƶlOffֽڡ
	CFile::endļβʼָƶlOffֽڡ


void SeekToBegin(); throw(CFileException);

DWORD SeekToEnd( ); throw( CFileException );

virual DWORD GetPosition() const ;throw(CFileException);