Very secure method to save and restore registry

// CRC32.h: interface for the CCRC32 class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_CRC32_H__A4F2A0C3_012C_44C2_8F33_200CC6AE4758__INCLUDED_)
#define AFX_CRC32_H__A4F2A0C3_012C_44C2_8F33_200CC6AE4758__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class CCRC32  
{
public:
	DWORD FileCrc32String(LPCTSTR szFilename, CString &CRC32);
	CCRC32();
	virtual ~CCRC32();
	void FreeTable(void);
	void InitTable(void);

protected:
	DWORD FileCrc32(LPCTSTR szFilename, DWORD &dwCrc32);

protected:
	DWORD *m_pdwCrc32Table;


};

#endif // !defined(AFX_CRC32_H__A4F2A0C3_012C_44C2_8F33_200CC6AE4758__INCLUDED_)