CHashCheck.hpp

/**
 * HashCheck Shell Extension
 * Copyright (C) Kai Liu.  All rights reserved.
 *
 * Please refer to readme.txt for information about this source code.
 * Please refer to license.txt for details about distribution and modification.
 **/

#ifndef __CHASHCHECK_HPP__
#define __CHASHCHECK_HPP__

#include "globals.h"

class CHashCheck : public IShellExtInit, IContextMenu, IShellPropSheetExt, IDropTarget
{
	protected:
		CREF m_cRef;
		HSIMPLELIST m_hList;
        HBITMAP m_hMenuBitmap;

	public:
		CHashCheck( );
		~CHashCheck() { InterlockedDecrement(&g_cRefThisDll); SLRelease(m_hList); if (m_hMenuBitmap) DeleteObject(m_hMenuBitmap); }

		// IUnknown members
		STDMETHODIMP QueryInterface( REFIID, LPVOID * );
		STDMETHODIMP_(ULONG) AddRef( ) { return(InterlockedIncrement(&m_cRef)); }
		STDMETHODIMP_(ULONG) Release( )
		{
			// We need a non-volatile variable, hence the cRef variable
			LONG cRef = InterlockedDecrement(&m_cRef);
			if (cRef == 0) delete this;
			return(cRef);
		}

		// IShellExtInit members
		STDMETHODIMP Initialize( LPCITEMIDLIST, LPDATAOBJECT, HKEY );

		// IContextMenu members
		STDMETHODIMP QueryContextMenu( HMENU, UINT, UINT, UINT, UINT );
		STDMETHODIMP InvokeCommand( LPCMINVOKECOMMANDINFO );
		STDMETHODIMP GetCommandString( UINT_PTR, UINT, UINT *, LPSTR, UINT );

		// IShellPropSheetExt members
		STDMETHODIMP AddPages( LPFNADDPROPSHEETPAGE, LPARAM );
		STDMETHODIMP ReplacePage( UINT, LPFNADDPROPSHEETPAGE, LPARAM ) { return(E_NOTIMPL); }

		// IDropTarget members
		STDMETHODIMP DragEnter( LPDATAOBJECT, DWORD, POINTL, PDWORD )  { return(E_NOTIMPL); }
		STDMETHODIMP DragOver( DWORD, POINTL, PDWORD )                 { return(E_NOTIMPL); }
		STDMETHODIMP DragLeave( )                                      { return(E_NOTIMPL); }
		STDMETHODIMP Drop( LPDATAOBJECT, DWORD, POINTL, PDWORD );
};

typedef CHashCheck *LPCHASHCHECK;

#endif