Function OpenTnefStream 

pub unsafe fn OpenTnefStream<P1, P4>(
    lpvsupport: *mut c_void,
    lpstream: P1,
    lpszstreamname: *const i8,
    ulflags: u32,
    lpmessage: P4,
    wkeyval: u16,
    lpptnef: *mut Option<ITnef>,
) -> Result<()>
where
    P1: Param<IStream>,
    P4: Param<IMessage>,