extern "ws2_32" fn WSAAsyncGetServByPort(HWND, u32, i32, ?[*:0]const u8, [*]u8, i32) callconv(WINAPI) HANDLE
hWnd: HWND,
wMsg: u32,
port: i32,
proto: ?[*:0]const u8,
buf: [*]u8,
buflen: i32,