WSAEnumNetworkEvents

// WS2_32.dll
#include <windows.h>

INT WSAEnumNetworkEvents(
    SOCKET s,
    WSAEVENT hEventObject,
    WSANETWORKEVENTS* lpNetworkEvents
);

<DllImport("WS2_32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WSAEnumNetworkEvents(
    s As UIntPtr,   ' SOCKET
    hEventObject As IntPtr,   ' WSAEVENT
    lpNetworkEvents As IntPtr   ' WSANETWORKEVENTS* out
) As Integer
End Function

' s : SOCKET
' hEventObject : WSAEVENT
' lpNetworkEvents : WSANETWORKEVENTS* out
Declare PtrSafe Function WSAEnumNetworkEvents Lib "ws2_32" ( _
    ByVal s As LongPtr, _
    ByVal hEventObject As LongPtr, _
    ByVal lpNetworkEvents As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

WSAEnumNetworkEvents = ctypes.windll.ws2_32.WSAEnumNetworkEvents
WSAEnumNetworkEvents.restype = ctypes.c_int
WSAEnumNetworkEvents.argtypes = [
    ctypes.c_size_t,  # s : SOCKET
    ctypes.c_ssize_t,  # hEventObject : WSAEVENT
    ctypes.c_void_p,  # lpNetworkEvents : WSANETWORKEVENTS* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WS2_32.dll')
WSAEnumNetworkEvents = Fiddle::Function.new(
  lib['WSAEnumNetworkEvents'],
  [
    Fiddle::TYPE_UINTPTR_T,  # s : SOCKET
    Fiddle::TYPE_INTPTR_T,  # hEventObject : WSAEVENT
    Fiddle::TYPE_VOIDP,  # lpNetworkEvents : WSANETWORKEVENTS* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ws2_32")]
extern "system" {
    fn WSAEnumNetworkEvents(
        s: usize,  // SOCKET
        hEventObject: isize,  // WSAEVENT
        lpNetworkEvents: *mut WSANETWORKEVENTS  // WSANETWORKEVENTS* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WS2_32.dll", SetLastError = true)]
public static extern int WSAEnumNetworkEvents(UIntPtr s, IntPtr hEventObject, IntPtr lpNetworkEvents);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WS2_32_WSAEnumNetworkEvents' -Namespace Win32 -PassThru
# $api::WSAEnumNetworkEvents(s, hEventObject, lpNetworkEvents)

#uselib "WS2_32.dll"
#func global WSAEnumNetworkEvents "WSAEnumNetworkEvents" sptr, sptr, sptr
; WSAEnumNetworkEvents s, hEventObject, varptr(lpNetworkEvents)   ; 戻り値は stat
; s : SOCKET -> "sptr"
; hEventObject : WSAEVENT -> "sptr"
; lpNetworkEvents : WSANETWORKEVENTS* out -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "WS2_32.dll"
#cfunc global WSAEnumNetworkEvents "WSAEnumNetworkEvents" sptr, sptr, var
; res = WSAEnumNetworkEvents(s, hEventObject, lpNetworkEvents)
; s : SOCKET -> "sptr"
; hEventObject : WSAEVENT -> "sptr"
; lpNetworkEvents : WSANETWORKEVENTS* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; INT WSAEnumNetworkEvents(SOCKET s, WSAEVENT hEventObject, WSANETWORKEVENTS* lpNetworkEvents)
#uselib "WS2_32.dll"
#cfunc global WSAEnumNetworkEvents "WSAEnumNetworkEvents" intptr, intptr, var
; res = WSAEnumNetworkEvents(s, hEventObject, lpNetworkEvents)
; s : SOCKET -> "intptr"
; hEventObject : WSAEVENT -> "intptr"
; lpNetworkEvents : WSANETWORKEVENTS* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	ws2_32 = windows.NewLazySystemDLL("WS2_32.dll")
	procWSAEnumNetworkEvents = ws2_32.NewProc("WSAEnumNetworkEvents")
)

// s (SOCKET), hEventObject (WSAEVENT), lpNetworkEvents (WSANETWORKEVENTS* out)
r1, _, err := procWSAEnumNetworkEvents.Call(
	uintptr(s),
	uintptr(hEventObject),
	uintptr(lpNetworkEvents),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function WSAEnumNetworkEvents(
  s: NativeUInt;   // SOCKET
  hEventObject: NativeInt;   // WSAEVENT
  lpNetworkEvents: Pointer   // WSANETWORKEVENTS* out
): Integer; stdcall;
  external 'WS2_32.dll' name 'WSAEnumNetworkEvents';

result := DllCall("WS2_32\WSAEnumNetworkEvents"
    , "UPtr", s   ; SOCKET
    , "Ptr", hEventObject   ; WSAEVENT
    , "Ptr", lpNetworkEvents   ; WSANETWORKEVENTS* out
    , "Int")   ; return: INT

●WSAEnumNetworkEvents(s, hEventObject, lpNetworkEvents) = DLL("WS2_32.dll", "int WSAEnumNetworkEvents(int, int, void*)")
# 呼び出し: WSAEnumNetworkEvents(s, hEventObject, lpNetworkEvents)
# s : SOCKET -> "int"
# hEventObject : WSAEVENT -> "int"
# lpNetworkEvents : WSANETWORKEVENTS* out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。