WSANtohl

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

INT WSANtohl(
    SOCKET s,
    DWORD netlong,
    DWORD* lphostlong
);

<DllImport("WS2_32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WSANtohl(
    s As UIntPtr,   ' SOCKET
    netlong As UInteger,   ' DWORD
    <Out> ByRef lphostlong As UInteger   ' DWORD* out
) As Integer
End Function

' s : SOCKET
' netlong : DWORD
' lphostlong : DWORD* out
Declare PtrSafe Function WSANtohl Lib "ws2_32" ( _
    ByVal s As LongPtr, _
    ByVal netlong As Long, _
    ByRef lphostlong As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

WSANtohl = ctypes.windll.ws2_32.WSANtohl
WSANtohl.restype = ctypes.c_int
WSANtohl.argtypes = [
    ctypes.c_size_t,  # s : SOCKET
    wintypes.DWORD,  # netlong : DWORD
    ctypes.POINTER(wintypes.DWORD),  # lphostlong : DWORD* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WS2_32.dll')
WSANtohl = Fiddle::Function.new(
  lib['WSANtohl'],
  [
    Fiddle::TYPE_UINTPTR_T,  # s : SOCKET
    -Fiddle::TYPE_INT,  # netlong : DWORD
    Fiddle::TYPE_VOIDP,  # lphostlong : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ws2_32")]
extern "system" {
    fn WSANtohl(
        s: usize,  // SOCKET
        netlong: u32,  // DWORD
        lphostlong: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WS2_32.dll", SetLastError = true)]
public static extern int WSANtohl(UIntPtr s, uint netlong, out uint lphostlong);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WS2_32_WSANtohl' -Namespace Win32 -PassThru
# $api::WSANtohl(s, netlong, lphostlong)

#uselib "WS2_32.dll"
#func global WSANtohl "WSANtohl" sptr, sptr, sptr
; WSANtohl s, netlong, varptr(lphostlong)   ; 戻り値は stat
; s : SOCKET -> "sptr"
; netlong : DWORD -> "sptr"
; lphostlong : DWORD* 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 WSANtohl "WSANtohl" sptr, int, var
; res = WSANtohl(s, netlong, lphostlong)
; s : SOCKET -> "sptr"
; netlong : DWORD -> "int"
; lphostlong : DWORD* 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 WSANtohl(SOCKET s, DWORD netlong, DWORD* lphostlong)
#uselib "WS2_32.dll"
#cfunc global WSANtohl "WSANtohl" intptr, int, var
; res = WSANtohl(s, netlong, lphostlong)
; s : SOCKET -> "intptr"
; netlong : DWORD -> "int"
; lphostlong : DWORD* 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")
	procWSANtohl = ws2_32.NewProc("WSANtohl")
)

// s (SOCKET), netlong (DWORD), lphostlong (DWORD* out)
r1, _, err := procWSANtohl.Call(
	uintptr(s),
	uintptr(netlong),
	uintptr(lphostlong),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function WSANtohl(
  s: NativeUInt;   // SOCKET
  netlong: DWORD;   // DWORD
  lphostlong: Pointer   // DWORD* out
): Integer; stdcall;
  external 'WS2_32.dll' name 'WSANtohl';

result := DllCall("WS2_32\WSANtohl"
    , "UPtr", s   ; SOCKET
    , "UInt", netlong   ; DWORD
    , "Ptr", lphostlong   ; DWORD* out
    , "Int")   ; return: INT

●WSANtohl(s, netlong, lphostlong) = DLL("WS2_32.dll", "int WSANtohl(int, dword, void*)")
# 呼び出し: WSANtohl(s, netlong, lphostlong)
# s : SOCKET -> "int"
# netlong : DWORD -> "dword"
# lphostlong : DWORD* 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)。