pub unsafe fn DRMGetSignedIssuanceLicenseEx<P0>(
    henv: u32,
    hissuancelicense: u32,
    uflags: u32,
    pbsymkey: Option<&[u8]>,
    wszsymkeytype: P0,
    pvreserved: Option<*const c_void>,
    henablingprincipal: u32,
    hboundlicenseclc: u32,
    pfncallback: DRMCALLBACK,
    pvcontext: *const c_void
) -> Result<()>
where P0: IntoParam<PCWSTR>,