pub unsafe extern "system" fn Icmp6SendEcho2(
    icmphandle: HANDLE,
    event: HANDLE,
    apcroutine: PIO_APC_ROUTINE,
    apccontext: *const c_void,
    sourceaddress: *const SOCKADDR_IN6,
    destinationaddress: *const SOCKADDR_IN6,
    requestdata: *const c_void,
    requestsize: u16,
    requestoptions: *const IP_OPTION_INFORMATION,
    replybuffer: *mut c_void,
    replysize: u32,
    timeout: u32,
) -> u32