首先先实现IDocHostUIHandlerDispatch接口

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class ATL_NO_VTABLE CMyUIHandler : 	public CComObjectRootEx
    
     ,	public CComCoClass
     
      ,	public IDispatchImpl
      
       {public:	CComQIPtr
       
         m_spExtDispatch;public:	CMyUIHandler()	{	}DECLARE_PROTECT_FINAL_CONSTRUCT()BEGIN_COM_MAP(CMyUIHandler)	COM_INTERFACE_ENTRY(IDocHostUIHandlerDispatch)	COM_INTERFACE_ENTRY(IDispatch)END_COM_MAP()// IXmnWrapperUIHandlerpublic:	// Do not show the context menu	STDMETHOD (ShowContextMenu) ( 		/* [in] */ DWORD dwID,		/* [in] */ DWORD x,		/* [in] */ DWORD y,		/* [in] */ IUnknown  *pcmdtReserved,		/* [in] */ IDispatch *pdispReserved,		/* [retval][out] */ HRESULT  *dwRetVal)	{		*dwRetVal = S_OK;		return S_OK;	}	// Mark all the other methods as not implemented	STDMETHOD (GetHostInfo) ( 		/* [out][in] */ DWORD  *pdwFlags,		/* [out][in] */ DWORD  *pdwDoubleClick)	{		return E_NOTIMPL;	}	STDMETHOD (ShowUI) ( 		/* [in] */ DWORD dwID,		/* [in] */ IUnknown  *pActiveObject,		/* [in] */ IUnknown  *pCommandTarget,		/* [in] */ IUnknown  *pFrame,		/* [in] */ IUnknown  *pDoc,		/* [retval][out] */ HRESULT  *dwRetVal)	{		return E_NOTIMPL;	}	STDMETHOD (HideUI) (void)	{		return E_NOTIMPL;	}	STDMETHOD (UpdateUI) (void)	{		return E_NOTIMPL;	}	STDMETHOD (EnableModeless) ( 		/* [in] */ VARIANT_BOOL fEnable)	{		return E_NOTIMPL;	}	STDMETHOD (OnDocWindowActivate) ( 		/* [in] */ VARIANT_BOOL fActivate)	{		return E_NOTIMPL;	}	STDMETHOD (OnFrameWindowActivate) ( 		/* [in] */ VARIANT_BOOL fActivate)	{		return E_NOTIMPL;	}	STDMETHOD (ResizeBorder) ( 		/* [in] */ long left,		/* [in] */ long top,		/* [in] */ long right,		/* [in] */ long bottom,		/* [in] */ IUnknown  *pUIWindow,		/* [in] */ VARIANT_BOOL fFrameWindow)	{		return E_NOTIMPL;	}	STDMETHOD (TranslateAccelerator) ( 		/* [in] */ DWORD hWnd,		/* [in] */ DWORD nMessage,		/* [in] */ DWORD wParam,		/* [in] */ DWORD lParam,		/* [in] */ BSTR bstrGuidCmdGroup,		/* [in] */ DWORD nCmdID,		/* [retval][out] */ HRESULT  *dwRetVal)	{		return E_NOTIMPL;	}	STDMETHOD (GetOptionKeyPath) ( 		/* [out] */ BSTR  *pbstrKey,		/* [in] */ DWORD dw)	{		return E_NOTIMPL;	}	STDMETHOD (GetDropTarget) ( 		/* [in] */ IUnknown  *pDropTarget,		/* [out] */ IUnknown  **ppDropTarget)	{		return E_NOTIMPL;	}	STDMETHOD (GetExternal) ( 		/* [out] */ IDispatch  **ppDispatch)	{		return m_spExtDispatch.CopyTo (ppDispatch);	}	STDMETHOD (TranslateUrl) ( 		/* [in] */ DWORD dwTranslate,		/* [in] */ BSTR bstrURLIn,		/* [out] */ BSTR  *pbstrURLOut)	{		return E_NOTIMPL;	}	STDMETHOD (FilterDataObject) ( 		/* [in] */ IUnknown  *pDO,		/* [out] */ IUnknown  **ppDORet)	{		return E_NOTIMPL;	}};
       
      
     
    

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然后通过SetExternalUIHandler将IDocHostUIHandlerDispatch指针传进CAxHostWindow

CComPtr
    
      punkCtrl;		CComQIPtr
     
       pWB2;		CComVariant v;		CRect rc(0,0,640,480);		m_wndIE.Create ( *this, rc, _T(""), WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN,			WS_EX_CLIENTEDGE );		//m_wndIE.CreateControlEx ( L"{8856F961-340A-11D0-A96B-00C04FD705A2}", NULL,		//	NULL, &punkCtrl );		m_wndIE.CreateControlEx ( L"Shell.Explorer", NULL,			NULL, &punkCtrl );		pWB2 = punkCtrl;		if ( pWB2 )			pWB2->Navigate ( CComBSTR("http://www.microsoft.com"), &v, &v, &v, &v );		CComPtr
      
        spUnk;		HRESULT hr = CMyUIHandler::_CreatorClass::CreateInstance(NULL, IID_IUnknown, (void**)&spUnk);		ATLASSERT(SUCCEEDED(hr));		CComQIPtr
       
         spUI = spUnk;		m_wndIE.SetExternalUIHandler(spUI);