pub unsafe extern "system" fn WSAJoinLeaf(
    s: SOCKET,
    name: *const SOCKADDR,
    namelen: i32,
    lpcallerdata: *const WSABUF,
    lpcalleedata: *mut WSABUF,
    lpsqos: *const QOS,
    lpgqos: *const QOS,
    dwflags: u32
) -> SOCKET