typedef struct IEnumStringVtbl
    {
        BEGIN_INTERFACE
        
        HRESULT ( STDMETHODCALLTYPE *QueryInterface )( 
            __RPC__in IEnumString * This,
            /* [in] */ __RPC__in REFIID riid,
            /* [annotation][iid_is][out] */ 
            __RPC__deref_out  void **ppvObject);
        
        ULONG ( STDMETHODCALLTYPE *AddRef )( 
            __RPC__in IEnumString * This);
        
        ULONG ( STDMETHODCALLTYPE *Release )( 
            __RPC__in IEnumString * This);
        
        /* [local] */ HRESULT ( STDMETHODCALLTYPE *Next )( 
            IEnumString * This,
            /* [in] */ ULONG celt,
            /* [annotation] */ 
            __RPC__out_ecount_part(celt,*pceltFetched)  LPOLESTR *rgelt,
            /* [annotation] */ 
            __out_opt  ULONG *pceltFetched);
        
        HRESULT ( STDMETHODCALLTYPE *Skip )( 
            __RPC__in IEnumString * This,
            /* [in] */ ULONG celt);
        
        HRESULT ( STDMETHODCALLTYPE *Reset )( 
            __RPC__in IEnumString * This);
        
        HRESULT ( STDMETHODCALLTYPE *Clone )( 
            __RPC__in IEnumString * This,
            /* [out] */ __RPC__deref_out_opt IEnumString **ppenum);
        
        END_INTERFACE
    } IEnumStringVtbl;