Function CryptSignHashW 

pub unsafe fn CryptSignHashW<P2>(
    hhash: usize,
    dwkeyspec: u32,
    szdescription: P2,
    dwflags: u32,
    pbsignature: Option<*mut u8>,
    pdwsiglen: *mut u32,
) -> Result<()>
where
    P2: Param<PCWSTR>,