public virtual extern HRESULT SetStrBufW( [In] int lDestPos, [In] int lDestLen, [In, MarshalAs(UnmanagedType.Interface)] IMLangStringBufW pSrcBuf, out int pcchActual, out int plActualLen );
public virtual extern void GetStrBufW([In] int lSrcPos, [In] int lSrcMaxLen, [MarshalAs(UnmanagedType.Interface)] out IMLangStringBufW ppDestBuf, out int plDestLen);