pub unsafe fn FwpmEngineOpen0<P0>(
    servername: P0,
    authnservice: u32,
    authidentity: Option<*const SEC_WINNT_AUTH_IDENTITY_W>,
    session: Option<*const FWPM_SESSION0>,
    enginehandle: *mut HANDLE
) -> u32
where P0: IntoParam<PCWSTR>,