Function vfwscanf 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn vfwscanf(
    stream: *mut FILE,
    format: *const wchar_t,
    __valist: VaList<'_>,
) -> c_int

See https://pubs.opengroup.org/onlinepubs/9799919799/functions/vfwscanf.html.