COM

var observerService = Components.classes["@mozilla.org/observer-service;1"] 
                            .getService (Components.interfaces.nsIObserverService); 
var enu = observerService.enumerateObservers("domwindowclosed") 

while(enu.hasMoreElements())
    {
        var x1 = enu.getNext()
    }

class ATL_NO_VTABLE CCBXShell :
	public CComObjectRootEx<CComSingleThreadModel>,
	public CComCoClass<CCBXShell,&CLSID_CBXShell>,
	public IDispatchImpl<ICBXShell, &IID_ICBXShell, &LIBID_CBXSHELLLib>, 
	public ISupportErrorInfo,
	public IPersistFile,
	public IExtractImage2,
	public IQueryInfo
{
public:
	CCBXShell() {}

	BEGIN_COM_MAP(CCBXShell)
		COM_INTERFACE_ENTRY(ICBXShell)
		COM_INTERFACE_ENTRY(IPersistFile)
		COM_INTERFACE_ENTRY(IQueryInfo)
		COM_INTERFACE_ENTRY(IExtractImage)
		COM_INTERFACE_ENTRY(IExtractImage2)
		COM_INTERFACE_ENTRY(IDispatch)
		COM_INTERFACE_ENTRY(ISupportErrorInfo)
	END_COM_MAP()

	//DECLARE_NOT_AGGREGATABLE(CCBXShell) 
	// Remove the comment from the line above if you don't want your object to 
	// support aggregation. 

	//_ATL_DEBUG_ADDREF_RELEASE_IMPL(CCBXShell)
	DECLARE_REGISTRY_RESOURCEID(IDR_CBXShell)
	DECLARE_PROTECT_FINAL_CONSTRUCT()

	// IPersistFile
	STDMETHOD(Load)(LPCOLESTR wszFile, DWORD dwMode) { return m_cbx.OnLoad(wszFile); }

	STDMETHOD(GetClassID)(LPCLSID clsid){return E_NOTIMPL;}
	STDMETHOD(IsDirty)(VOID){return E_NOTIMPL;}
	STDMETHOD(Save)(LPCOLESTR, BOOL){return E_NOTIMPL;}
	STDMETHOD(SaveCompleted)(LPCOLESTR){return E_NOTIMPL;}
	STDMETHOD(GetCurFile)(LPOLESTR FAR*){return E_NOTIMPL;}

	// IExtractImage/IExtractImage2
	STDMETHOD(GetLocation)(LPWSTR pszPathBuffer, DWORD cchMax,
							DWORD *pdwPriority, const SIZE *prgSize,
							DWORD dwRecClrDepth, DWORD *pdwFlags)
{ return m_cbx.OnGetLocation(prgSize, pdwFlags); }
	STDMETHOD(Extract)(HBITMAP* phBmpThumbnail) { return m_cbx.OnExtract(phBmpThumbnail); }
	// IExtractImage2
	STDMETHOD(GetDateStamp)(FILETIME *pDateStamp) { return m_cbx.OnGetDateStamp(pDateStamp);}

	// IQueryInfo
	STDMETHOD(GetInfoTip)(DWORD dwFlags, LPWSTR* ppwszTip) { return m_cbx.OnGetInfoTip(ppwszTip);}

	STDMETHOD(GetInfoFlags)(LPDWORD pdwFlags) { *pdwFlags = 0; return E_NOTIMPL;}


	// ISupportsErrorInfo
	STDMETHOD(InterfaceSupportsErrorInfo)(REFIID riid);

	// ICBXShell
	//public:

private:
	__cbx::CCBXArchive m_cbx;//implements methods code
};

HRESULT OnGetLocation(const SIZE *prgSize, DWORD *pdwFlags)
{
    ATLTRACE("IExtractImage2::GetLocation\n");
    m_thumbSize = *prgSize;
    *pdwFlags |= (IEIFLAG_CACHE | IEIFLAG_REFRESH);//cache thumbnails
    if (*pdwFlags & IEIFLAG_ASYNC) return E_PENDING;//???
return NOERROR;
}