typedef struct ICallFrameWalkerVtbl
    {
        BEGIN_INTERFACE
        
        HRESULT ( STDMETHODCALLTYPE *QueryInterface )( 
            ICallFrameWalker * This,
            /* [in] */ REFIID riid,
            /* [annotation][iid_is][out] */ 
            __RPC__deref_out  void **ppvObject);
        
        ULONG ( STDMETHODCALLTYPE *AddRef )( 
            ICallFrameWalker * This);
        
        ULONG ( STDMETHODCALLTYPE *Release )( 
            ICallFrameWalker * This);
        
        HRESULT ( STDMETHODCALLTYPE *OnWalkInterface )( 
            ICallFrameWalker * This,
            /* [in] */ REFIID iid,
            /* [in] */ PVOID *ppvInterface,
            /* [in] */ BOOL fIn,
            /* [in] */ BOOL fOut);
        
        END_INTERFACE
    } ICallFrameWalkerVtbl;