A File Checksum Shell Menu Extension DLL

// MenuItem.h : Declaration of the CMenuItem

#ifndef __MENUITEM_H_
#define __MENUITEM_H_

#include "resource.h"       // main symbols

#include <shlobj.h>
#include <comdef.h>

#include <string>

/////////////////////////////////////////////////////////////////////////////
// CMenuItem
class ATL_NO_VTABLE CMenuItem : 
    public CComObjectRootEx<CComSingleThreadModel>,
    public CComCoClass<CMenuItem, &CLSID_MenuItem>,
    // public IMenuItem
    public IShellExtInit,
    public IContextMenu
{
public:
	CMenuItem() { }

protected:
    std::basic_string<TCHAR> file;

public:
    // IShellExtInit
    STDMETHODIMP Initialize(LPCITEMIDLIST, LPDATAOBJECT, HKEY);

public:
    // IContextMenu
    STDMETHODIMP InvokeCommand(LPCMINVOKECOMMANDINFO);
    STDMETHODIMP GetCommandString(UINT, UINT, UINT*, LPSTR, UINT);
    STDMETHODIMP QueryContextMenu(HMENU, UINT, UINT, UINT, UINT);

DECLARE_REGISTRY_RESOURCEID(IDR_MENUITEM)
DECLARE_NOT_AGGREGATABLE(CMenuItem)

DECLARE_PROTECT_FINAL_CONSTRUCT()

BEGIN_COM_MAP(CMenuItem)
	// COM_INTERFACE_ENTRY(IMenuItem)
    COM_INTERFACE_ENTRY(IShellExtInit)
    COM_INTERFACE_ENTRY(IContextMenu)
END_COM_MAP()

// IMenuItem
public:
};

#endif //__MENUITEM_H_