Persistant Hash Table: Part 2

#pragma once
#include<Windows.h>
#include<string>
using namespace std;
class CSharedMemory
{
	HANDLE m_fh;
	HANDLE m_hfilemap;
	PBYTE m_pb;
	DWORD m_filesize;
public:
	CSharedMemory():m_fh(0),m_hfilemap(0),m_pb(0),m_filesize(0)
	{
	}
	int createsm(wstring &path,PBYTE *pb);
	int opensm(wstring &path,PBYTE *pb);
	int flush();
	//PBYTE getmemory();
	~CSharedMemory()
	{
		CloseHandle(m_fh);
		CloseHandle(m_hfilemap);
		UnmapViewOfFile(m_pb);
	}
};