DsGetDcNextA

// NETAPI32.dll  (ANSI / -A)
#include <windows.h>

DWORD DsGetDcNextA(
    HANDLE GetDcContextHandle,
    DWORD* SockAddressCount,   // optional
    SOCKET_ADDRESS** SockAddresses,   // optional
    LPSTR* DnsHostName   // optional
);

<DllImport("NETAPI32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function DsGetDcNextA(
    GetDcContextHandle As IntPtr,   ' HANDLE
    SockAddressCount As IntPtr,   ' DWORD* optional, out
    SockAddresses As IntPtr,   ' SOCKET_ADDRESS** optional, out
    DnsHostName As IntPtr   ' LPSTR* optional, out
) As UInteger
End Function

' GetDcContextHandle : HANDLE
' SockAddressCount : DWORD* optional, out
' SockAddresses : SOCKET_ADDRESS** optional, out
' DnsHostName : LPSTR* optional, out
Declare PtrSafe Function DsGetDcNextA Lib "netapi32" ( _
    ByVal GetDcContextHandle As LongPtr, _
    ByVal SockAddressCount As LongPtr, _
    ByVal SockAddresses As LongPtr, _
    ByVal DnsHostName 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

DsGetDcNextA = ctypes.windll.netapi32.DsGetDcNextA
DsGetDcNextA.restype = wintypes.DWORD
DsGetDcNextA.argtypes = [
    wintypes.HANDLE,  # GetDcContextHandle : HANDLE
    ctypes.POINTER(wintypes.DWORD),  # SockAddressCount : DWORD* optional, out
    ctypes.c_void_p,  # SockAddresses : SOCKET_ADDRESS** optional, out
    ctypes.c_void_p,  # DnsHostName : LPSTR* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('NETAPI32.dll')
DsGetDcNextA = Fiddle::Function.new(
  lib['DsGetDcNextA'],
  [
    Fiddle::TYPE_VOIDP,  # GetDcContextHandle : HANDLE
    Fiddle::TYPE_VOIDP,  # SockAddressCount : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # SockAddresses : SOCKET_ADDRESS** optional, out
    Fiddle::TYPE_VOIDP,  # DnsHostName : LPSTR* optional, out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "netapi32")]
extern "system" {
    fn DsGetDcNextA(
        GetDcContextHandle: *mut core::ffi::c_void,  // HANDLE
        SockAddressCount: *mut u32,  // DWORD* optional, out
        SockAddresses: *mut *mut SOCKET_ADDRESS,  // SOCKET_ADDRESS** optional, out
        DnsHostName: *mut *mut u8  // LPSTR* optional, out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("NETAPI32.dll", CharSet = CharSet.Ansi)]
public static extern uint DsGetDcNextA(IntPtr GetDcContextHandle, IntPtr SockAddressCount, IntPtr SockAddresses, IntPtr DnsHostName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'NETAPI32_DsGetDcNextA' -Namespace Win32 -PassThru
# $api::DsGetDcNextA(GetDcContextHandle, SockAddressCount, SockAddresses, DnsHostName)

#uselib "NETAPI32.dll"
#func global DsGetDcNextA "DsGetDcNextA" sptr, sptr, sptr, sptr
; DsGetDcNextA GetDcContextHandle, varptr(SockAddressCount), varptr(SockAddresses), varptr(DnsHostName)   ; 戻り値は stat
; GetDcContextHandle : HANDLE -> "sptr"
; SockAddressCount : DWORD* optional, out -> "sptr"
; SockAddresses : SOCKET_ADDRESS** optional, out -> "sptr"
; DnsHostName : LPSTR* optional, 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。

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

var (
	netapi32 = windows.NewLazySystemDLL("NETAPI32.dll")
	procDsGetDcNextA = netapi32.NewProc("DsGetDcNextA")
)

// GetDcContextHandle (HANDLE), SockAddressCount (DWORD* optional, out), SockAddresses (SOCKET_ADDRESS** optional, out), DnsHostName (LPSTR* optional, out)
r1, _, err := procDsGetDcNextA.Call(
	uintptr(GetDcContextHandle),
	uintptr(SockAddressCount),
	uintptr(SockAddresses),
	uintptr(DnsHostName),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DsGetDcNextA(
  GetDcContextHandle: THandle;   // HANDLE
  SockAddressCount: Pointer;   // DWORD* optional, out
  SockAddresses: Pointer;   // SOCKET_ADDRESS** optional, out
  DnsHostName: PPAnsiChar   // LPSTR* optional, out
): DWORD; stdcall;
  external 'NETAPI32.dll' name 'DsGetDcNextA';

result := DllCall("NETAPI32\DsGetDcNextA"
    , "Ptr", GetDcContextHandle   ; HANDLE
    , "Ptr", SockAddressCount   ; DWORD* optional, out
    , "Ptr", SockAddresses   ; SOCKET_ADDRESS** optional, out
    , "Ptr", DnsHostName   ; LPSTR* optional, out
    , "UInt")   ; return: DWORD

●DsGetDcNextA(GetDcContextHandle, SockAddressCount, SockAddresses, DnsHostName) = DLL("NETAPI32.dll", "dword DsGetDcNextA(void*, void*, void*, void*)")
# 呼び出し: DsGetDcNextA(GetDcContextHandle, SockAddressCount, SockAddresses, DnsHostName)
# GetDcContextHandle : HANDLE -> "void*"
# SockAddressCount : DWORD* optional, out -> "void*"
# SockAddresses : SOCKET_ADDRESS** optional, out -> "void*"
# DnsHostName : LPSTR* optional, 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)。

const std = @import("std");

extern "netapi32" fn DsGetDcNextA(
    GetDcContextHandle: ?*anyopaque, // HANDLE
    SockAddressCount: [*c]u32, // DWORD* optional, out
    SockAddresses: [*c][*c]SOCKET_ADDRESS, // SOCKET_ADDRESS** optional, out
    DnsHostName: [*c][*c]u8 // LPSTR* optional, out
) callconv(std.os.windows.WINAPI) u32;

proc DsGetDcNextA(
    GetDcContextHandle: pointer,  # HANDLE
    SockAddressCount: ptr uint32,  # DWORD* optional, out
    SockAddresses: ptr SOCKET_ADDRESS,  # SOCKET_ADDRESS** optional, out
    DnsHostName: ptr cstring  # LPSTR* optional, out
): uint32 {.importc: "DsGetDcNextA", stdcall, dynlib: "NETAPI32.dll".}

pragma(lib, "netapi32");
extern(Windows)
uint DsGetDcNextA(
    void* GetDcContextHandle,   // HANDLE
    uint* SockAddressCount,   // DWORD* optional, out
    SOCKET_ADDRESS** SockAddresses,   // SOCKET_ADDRESS** optional, out
    char** DnsHostName   // LPSTR* optional, out
);

ccall((:DsGetDcNextA, "NETAPI32.dll"), stdcall, UInt32,
      (Ptr{Cvoid}, Ptr{UInt32}, Ptr{SOCKET_ADDRESS}, Ptr{Ptr{UInt8}}),
      GetDcContextHandle, SockAddressCount, SockAddresses, DnsHostName)
# GetDcContextHandle : HANDLE -> Ptr{Cvoid}
# SockAddressCount : DWORD* optional, out -> Ptr{UInt32}
# SockAddresses : SOCKET_ADDRESS** optional, out -> Ptr{SOCKET_ADDRESS}
# DnsHostName : LPSTR* optional, out -> Ptr{Ptr{UInt8}}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t DsGetDcNextA(
    void* GetDcContextHandle,
    uint32_t* SockAddressCount,
    void* SockAddresses,
    char** DnsHostName);
]]
local netapi32 = ffi.load("netapi32")
-- netapi32.DsGetDcNextA(GetDcContextHandle, SockAddressCount, SockAddresses, DnsHostName)
-- GetDcContextHandle : HANDLE
-- SockAddressCount : DWORD* optional, out
-- SockAddresses : SOCKET_ADDRESS** optional, out
-- DnsHostName : LPSTR* optional, out
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('NETAPI32.dll');
const DsGetDcNextA = lib.func('__stdcall', 'DsGetDcNextA', 'uint32_t', ['void *', 'uint32_t *', 'void *', 'void *']);
// DsGetDcNextA(GetDcContextHandle, SockAddressCount, SockAddresses, DnsHostName)
// GetDcContextHandle : HANDLE -> 'void *'
// SockAddressCount : DWORD* optional, out -> 'uint32_t *'
// SockAddresses : SOCKET_ADDRESS** optional, out -> 'void *'
// DnsHostName : LPSTR* optional, out -> 'void *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("NETAPI32.dll", {
  DsGetDcNextA: { parameters: ["pointer", "pointer", "pointer", "pointer"], result: "u32" },
});
// lib.symbols.DsGetDcNextA(GetDcContextHandle, SockAddressCount, SockAddresses, DnsHostName)
// GetDcContextHandle : HANDLE -> "pointer"
// SockAddressCount : DWORD* optional, out -> "pointer"
// SockAddresses : SOCKET_ADDRESS** optional, out -> "pointer"
// DnsHostName : LPSTR* optional, out -> "pointer"
// 文字列は "buffer"。ANSI(-A) は new TextEncoder() で UTF-8/ANSI バイト列(末尾に \x00)を渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
uint32_t DsGetDcNextA(
    void* GetDcContextHandle,
    uint32_t* SockAddressCount,
    void* SockAddresses,
    char** DnsHostName);
C, "NETAPI32.dll");
// $ffi->DsGetDcNextA(GetDcContextHandle, SockAddressCount, SockAddresses, DnsHostName);
// GetDcContextHandle : HANDLE
// SockAddressCount : DWORD* optional, out
// SockAddresses : SOCKET_ADDRESS** optional, out
// DnsHostName : LPSTR* optional, out
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Netapi32 extends StdCallLibrary {
    Netapi32 INSTANCE = Native.load("netapi32", Netapi32.class, W32APIOptions.ASCII_OPTIONS);
    int DsGetDcNextA(
        Pointer GetDcContextHandle,   // HANDLE
        IntByReference SockAddressCount,   // DWORD* optional, out
        Pointer SockAddresses,   // SOCKET_ADDRESS** optional, out
        PointerByReference DnsHostName   // LPSTR* optional, out
    );
}

@[Link("netapi32")]
lib LibNETAPI32
  fun DsGetDcNextA = DsGetDcNextA(
    GetDcContextHandle : Void*,   # HANDLE
    SockAddressCount : UInt32*,   # DWORD* optional, out
    SockAddresses : SOCKET_ADDRESS**,   # SOCKET_ADDRESS** optional, out
    DnsHostName : UInt8**   # LPSTR* optional, out
  ) : UInt32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef DsGetDcNextANative = Uint32 Function(Pointer<Void>, Pointer<Uint32>, Pointer<Void>, Pointer<Pointer<Utf8>>);
typedef DsGetDcNextADart = int Function(Pointer<Void>, Pointer<Uint32>, Pointer<Void>, Pointer<Pointer<Utf8>>);
final DsGetDcNextA = DynamicLibrary.open('NETAPI32.dll')
    .lookupFunction<DsGetDcNextANative, DsGetDcNextADart>('DsGetDcNextA');
// GetDcContextHandle : HANDLE -> Pointer<Void>
// SockAddressCount : DWORD* optional, out -> Pointer<Uint32>
// SockAddresses : SOCKET_ADDRESS** optional, out -> Pointer<Void>
// DnsHostName : LPSTR* optional, out -> Pointer<Pointer<Utf8>>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DsGetDcNextA(
  GetDcContextHandle: THandle;   // HANDLE
  SockAddressCount: Pointer;   // DWORD* optional, out
  SockAddresses: Pointer;   // SOCKET_ADDRESS** optional, out
  DnsHostName: PPAnsiChar   // LPSTR* optional, out
): DWORD; stdcall;
  external 'NETAPI32.dll' name 'DsGetDcNextA';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "DsGetDcNextA"
  c_DsGetDcNextA :: Ptr () -> Ptr Word32 -> Ptr () -> Ptr CString -> IO Word32
-- GetDcContextHandle : HANDLE -> Ptr ()
-- SockAddressCount : DWORD* optional, out -> Ptr Word32
-- SockAddresses : SOCKET_ADDRESS** optional, out -> Ptr ()
-- DnsHostName : LPSTR* optional, out -> Ptr CString
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let dsgetdcnexta =
  foreign "DsGetDcNextA"
    ((ptr void) @-> (ptr uint32_t) @-> (ptr void) @-> (ptr string) @-> returning uint32_t)
(* GetDcContextHandle : HANDLE -> (ptr void) *)
(* SockAddressCount : DWORD* optional, out -> (ptr uint32_t) *)
(* SockAddresses : SOCKET_ADDRESS** optional, out -> (ptr void) *)
(* DnsHostName : LPSTR* optional, out -> (ptr string) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library netapi32 (t "NETAPI32.dll"))
(cffi:use-foreign-library netapi32)

(cffi:defcfun ("DsGetDcNextA" ds-get-dc-next-a :convention :stdcall) :uint32
  (get-dc-context-handle :pointer)   ; HANDLE
  (sock-address-count :pointer)   ; DWORD* optional, out
  (sock-addresses :pointer)   ; SOCKET_ADDRESS** optional, out
  (dns-host-name :pointer))   ; LPSTR* optional, out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $DsGetDcNextA = Win32::API::More->new('NETAPI32',
    'DWORD DsGetDcNextA(HANDLE GetDcContextHandle, LPVOID SockAddressCount, LPVOID SockAddresses, LPVOID DnsHostName)');
# my $ret = $DsGetDcNextA->Call($GetDcContextHandle, $SockAddressCount, $SockAddresses, $DnsHostName);
# GetDcContextHandle : HANDLE -> HANDLE
# SockAddressCount : DWORD* optional, out -> LPVOID
# SockAddresses : SOCKET_ADDRESS** optional, out -> LPVOID
# DnsHostName : LPSTR* optional, out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。