class View
{
public:
        // needed by CPersistentStorage
        View()
        {
        }

        View(CFileMapping & fm) : m_lpBase(MapViewOfFile(fm.m_hMapFile, FILE_MAP_ALL_ACCESS, 0, 0, 0))
        {
                if (m_lpBase == NULL)
                {
                        AtlThrowLastWin32();
                }
        }

        ~View()
        {
                UnmapViewOfFile(m_lpBase);
        }

        View & operator=(View & that)
        {
                m_lpBase = that.m_lpBase;
                that.m_lpBase = NULL;
                return *this;
        }

        volatile LPVOID m_lpBase;
};