Function CoGetStandardMarshal 

pub unsafe fn CoGetStandardMarshal<P1>(
    riid: *const GUID,
    punk: P1,
    dwdestcontext: u32,
    pvdestcontext: Option<*const c_void>,
    mshlflags: u32,
) -> Result<IMarshal>
where
    P1: Param<IUnknown>,