DhcpV6GetFreeIPAddress

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

DWORD DhcpV6GetFreeIPAddress(
    LPWSTR ServerIpAddress,   // optional
    DHCP_IPV6_ADDRESS ScopeId,
    DHCP_IPV6_ADDRESS StartIP,
    DHCP_IPV6_ADDRESS EndIP,
    DWORD NumFreeAddrReq,
    DHCPV6_IP_ARRAY** IPAddrList
);

<DllImport("DHCPSAPI.dll", ExactSpelling:=True)>
Public Shared Function DhcpV6GetFreeIPAddress(
    <MarshalAs(UnmanagedType.LPWStr)> ServerIpAddress As String,   ' LPWSTR optional
    ScopeId As DHCP_IPV6_ADDRESS,   ' DHCP_IPV6_ADDRESS
    StartIP As DHCP_IPV6_ADDRESS,   ' DHCP_IPV6_ADDRESS
    EndIP As DHCP_IPV6_ADDRESS,   ' DHCP_IPV6_ADDRESS
    NumFreeAddrReq As UInteger,   ' DWORD
    IPAddrList As IntPtr   ' DHCPV6_IP_ARRAY** out
) As UInteger
End Function

' ServerIpAddress : LPWSTR optional
' ScopeId : DHCP_IPV6_ADDRESS
' StartIP : DHCP_IPV6_ADDRESS
' EndIP : DHCP_IPV6_ADDRESS
' NumFreeAddrReq : DWORD
' IPAddrList : DHCPV6_IP_ARRAY** out
Declare PtrSafe Function DhcpV6GetFreeIPAddress Lib "dhcpsapi" ( _
    ByVal ServerIpAddress As LongPtr, _
    ByVal ScopeId As LongPtr, _
    ByVal StartIP As LongPtr, _
    ByVal EndIP As LongPtr, _
    ByVal NumFreeAddrReq As Long, _
    ByVal IPAddrList 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

DhcpV6GetFreeIPAddress = ctypes.windll.dhcpsapi.DhcpV6GetFreeIPAddress
DhcpV6GetFreeIPAddress.restype = wintypes.DWORD
DhcpV6GetFreeIPAddress.argtypes = [
    wintypes.LPCWSTR,  # ServerIpAddress : LPWSTR optional
    DHCP_IPV6_ADDRESS,  # ScopeId : DHCP_IPV6_ADDRESS
    DHCP_IPV6_ADDRESS,  # StartIP : DHCP_IPV6_ADDRESS
    DHCP_IPV6_ADDRESS,  # EndIP : DHCP_IPV6_ADDRESS
    wintypes.DWORD,  # NumFreeAddrReq : DWORD
    ctypes.c_void_p,  # IPAddrList : DHCPV6_IP_ARRAY** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DHCPSAPI.dll')
DhcpV6GetFreeIPAddress = Fiddle::Function.new(
  lib['DhcpV6GetFreeIPAddress'],
  [
    Fiddle::TYPE_VOIDP,  # ServerIpAddress : LPWSTR optional
    Fiddle::TYPE_VOIDP,  # ScopeId : DHCP_IPV6_ADDRESS
    Fiddle::TYPE_VOIDP,  # StartIP : DHCP_IPV6_ADDRESS
    Fiddle::TYPE_VOIDP,  # EndIP : DHCP_IPV6_ADDRESS
    -Fiddle::TYPE_INT,  # NumFreeAddrReq : DWORD
    Fiddle::TYPE_VOIDP,  # IPAddrList : DHCPV6_IP_ARRAY** out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpsapi")]
extern "system" {
    fn DhcpV6GetFreeIPAddress(
        ServerIpAddress: *mut u16,  // LPWSTR optional
        ScopeId: DHCP_IPV6_ADDRESS,  // DHCP_IPV6_ADDRESS
        StartIP: DHCP_IPV6_ADDRESS,  // DHCP_IPV6_ADDRESS
        EndIP: DHCP_IPV6_ADDRESS,  // DHCP_IPV6_ADDRESS
        NumFreeAddrReq: u32,  // DWORD
        IPAddrList: *mut *mut DHCPV6_IP_ARRAY  // DHCPV6_IP_ARRAY** out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DHCPSAPI.dll")]
public static extern uint DhcpV6GetFreeIPAddress([MarshalAs(UnmanagedType.LPWStr)] string ServerIpAddress, DHCP_IPV6_ADDRESS ScopeId, DHCP_IPV6_ADDRESS StartIP, DHCP_IPV6_ADDRESS EndIP, uint NumFreeAddrReq, IntPtr IPAddrList);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DHCPSAPI_DhcpV6GetFreeIPAddress' -Namespace Win32 -PassThru
# $api::DhcpV6GetFreeIPAddress(ServerIpAddress, ScopeId, StartIP, EndIP, NumFreeAddrReq, IPAddrList)

#uselib "DHCPSAPI.dll"
#func global DhcpV6GetFreeIPAddress "DhcpV6GetFreeIPAddress" sptr, sptr, sptr, sptr, sptr, sptr
; DhcpV6GetFreeIPAddress ServerIpAddress, ScopeId, StartIP, EndIP, NumFreeAddrReq, varptr(IPAddrList)   ; 戻り値は stat
; ServerIpAddress : LPWSTR optional -> "sptr"
; ScopeId : DHCP_IPV6_ADDRESS -> "sptr"
; StartIP : DHCP_IPV6_ADDRESS -> "sptr"
; EndIP : DHCP_IPV6_ADDRESS -> "sptr"
; NumFreeAddrReq : DWORD -> "sptr"
; IPAddrList : DHCPV6_IP_ARRAY** out -> "sptr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 (
	dhcpsapi = windows.NewLazySystemDLL("DHCPSAPI.dll")
	procDhcpV6GetFreeIPAddress = dhcpsapi.NewProc("DhcpV6GetFreeIPAddress")
)

// ServerIpAddress (LPWSTR optional), ScopeId (DHCP_IPV6_ADDRESS), StartIP (DHCP_IPV6_ADDRESS), EndIP (DHCP_IPV6_ADDRESS), NumFreeAddrReq (DWORD), IPAddrList (DHCPV6_IP_ARRAY** out)
r1, _, err := procDhcpV6GetFreeIPAddress.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServerIpAddress))),
	uintptr(ScopeId),
	uintptr(StartIP),
	uintptr(EndIP),
	uintptr(NumFreeAddrReq),
	uintptr(IPAddrList),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpV6GetFreeIPAddress(
  ServerIpAddress: PWideChar;   // LPWSTR optional
  ScopeId: DHCP_IPV6_ADDRESS;   // DHCP_IPV6_ADDRESS
  StartIP: DHCP_IPV6_ADDRESS;   // DHCP_IPV6_ADDRESS
  EndIP: DHCP_IPV6_ADDRESS;   // DHCP_IPV6_ADDRESS
  NumFreeAddrReq: DWORD;   // DWORD
  IPAddrList: Pointer   // DHCPV6_IP_ARRAY** out
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpV6GetFreeIPAddress';

result := DllCall("DHCPSAPI\DhcpV6GetFreeIPAddress"
    , "WStr", ServerIpAddress   ; LPWSTR optional
    , "Ptr", ScopeId   ; DHCP_IPV6_ADDRESS
    , "Ptr", StartIP   ; DHCP_IPV6_ADDRESS
    , "Ptr", EndIP   ; DHCP_IPV6_ADDRESS
    , "UInt", NumFreeAddrReq   ; DWORD
    , "Ptr", IPAddrList   ; DHCPV6_IP_ARRAY** out
    , "UInt")   ; return: DWORD

●DhcpV6GetFreeIPAddress(ServerIpAddress, ScopeId, StartIP, EndIP, NumFreeAddrReq, IPAddrList) = DLL("DHCPSAPI.dll", "dword DhcpV6GetFreeIPAddress(char*, void*, void*, void*, dword, void*)")
# 呼び出し: DhcpV6GetFreeIPAddress(ServerIpAddress, ScopeId, StartIP, EndIP, NumFreeAddrReq, IPAddrList)
# ServerIpAddress : LPWSTR optional -> "char*"
# ScopeId : DHCP_IPV6_ADDRESS -> "void*"
# StartIP : DHCP_IPV6_ADDRESS -> "void*"
# EndIP : DHCP_IPV6_ADDRESS -> "void*"
# NumFreeAddrReq : DWORD -> "dword"
# IPAddrList : DHCPV6_IP_ARRAY** 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 "dhcpsapi" fn DhcpV6GetFreeIPAddress(
    ServerIpAddress: [*c]const u16, // LPWSTR optional
    ScopeId: DHCP_IPV6_ADDRESS, // DHCP_IPV6_ADDRESS
    StartIP: DHCP_IPV6_ADDRESS, // DHCP_IPV6_ADDRESS
    EndIP: DHCP_IPV6_ADDRESS, // DHCP_IPV6_ADDRESS
    NumFreeAddrReq: u32, // DWORD
    IPAddrList: [*c][*c]DHCPV6_IP_ARRAY // DHCPV6_IP_ARRAY** out
) callconv(std.os.windows.WINAPI) u32;

proc DhcpV6GetFreeIPAddress(
    ServerIpAddress: WideCString,  # LPWSTR optional
    ScopeId: DHCP_IPV6_ADDRESS,  # DHCP_IPV6_ADDRESS
    StartIP: DHCP_IPV6_ADDRESS,  # DHCP_IPV6_ADDRESS
    EndIP: DHCP_IPV6_ADDRESS,  # DHCP_IPV6_ADDRESS
    NumFreeAddrReq: uint32,  # DWORD
    IPAddrList: ptr DHCPV6_IP_ARRAY  # DHCPV6_IP_ARRAY** out
): uint32 {.importc: "DhcpV6GetFreeIPAddress", stdcall, dynlib: "DHCPSAPI.dll".}

pragma(lib, "dhcpsapi");
extern(Windows)
uint DhcpV6GetFreeIPAddress(
    const(wchar)* ServerIpAddress,   // LPWSTR optional
    DHCP_IPV6_ADDRESS ScopeId,   // DHCP_IPV6_ADDRESS
    DHCP_IPV6_ADDRESS StartIP,   // DHCP_IPV6_ADDRESS
    DHCP_IPV6_ADDRESS EndIP,   // DHCP_IPV6_ADDRESS
    uint NumFreeAddrReq,   // DWORD
    DHCPV6_IP_ARRAY** IPAddrList   // DHCPV6_IP_ARRAY** out
);

ccall((:DhcpV6GetFreeIPAddress, "DHCPSAPI.dll"), stdcall, UInt32,
      (Cwstring, DHCP_IPV6_ADDRESS, DHCP_IPV6_ADDRESS, DHCP_IPV6_ADDRESS, UInt32, Ptr{DHCPV6_IP_ARRAY}),
      ServerIpAddress, ScopeId, StartIP, EndIP, NumFreeAddrReq, IPAddrList)
# ServerIpAddress : LPWSTR optional -> Cwstring
# ScopeId : DHCP_IPV6_ADDRESS -> DHCP_IPV6_ADDRESS
# StartIP : DHCP_IPV6_ADDRESS -> DHCP_IPV6_ADDRESS
# EndIP : DHCP_IPV6_ADDRESS -> DHCP_IPV6_ADDRESS
# NumFreeAddrReq : DWORD -> UInt32
# IPAddrList : DHCPV6_IP_ARRAY** out -> Ptr{DHCPV6_IP_ARRAY}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t DhcpV6GetFreeIPAddress(
    const uint16_t* ServerIpAddress,
    DHCP_IPV6_ADDRESS ScopeId,
    DHCP_IPV6_ADDRESS StartIP,
    DHCP_IPV6_ADDRESS EndIP,
    uint32_t NumFreeAddrReq,
    void* IPAddrList);
]]
local dhcpsapi = ffi.load("dhcpsapi")
-- dhcpsapi.DhcpV6GetFreeIPAddress(ServerIpAddress, ScopeId, StartIP, EndIP, NumFreeAddrReq, IPAddrList)
-- ServerIpAddress : LPWSTR optional
-- ScopeId : DHCP_IPV6_ADDRESS
-- StartIP : DHCP_IPV6_ADDRESS
-- EndIP : DHCP_IPV6_ADDRESS
-- NumFreeAddrReq : DWORD
-- IPAddrList : DHCPV6_IP_ARRAY** 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('DHCPSAPI.dll');
const DhcpV6GetFreeIPAddress = lib.func('__stdcall', 'DhcpV6GetFreeIPAddress', 'uint32_t', ['str16', 'DHCP_IPV6_ADDRESS', 'DHCP_IPV6_ADDRESS', 'DHCP_IPV6_ADDRESS', 'uint32_t', 'void *']);
// DhcpV6GetFreeIPAddress(ServerIpAddress, ScopeId, StartIP, EndIP, NumFreeAddrReq, IPAddrList)
// ServerIpAddress : LPWSTR optional -> 'str16'
// ScopeId : DHCP_IPV6_ADDRESS -> 'DHCP_IPV6_ADDRESS'
// StartIP : DHCP_IPV6_ADDRESS -> 'DHCP_IPV6_ADDRESS'
// EndIP : DHCP_IPV6_ADDRESS -> 'DHCP_IPV6_ADDRESS'
// NumFreeAddrReq : DWORD -> 'uint32_t'
// IPAddrList : DHCPV6_IP_ARRAY** 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("DHCPSAPI.dll", {
  DhcpV6GetFreeIPAddress: { parameters: ["buffer", "buffer", "buffer", "buffer", "u32", "pointer"], result: "u32" },
});
// lib.symbols.DhcpV6GetFreeIPAddress(ServerIpAddress, ScopeId, StartIP, EndIP, NumFreeAddrReq, IPAddrList)
// ServerIpAddress : LPWSTR optional -> "buffer"
// ScopeId : DHCP_IPV6_ADDRESS -> "buffer"
// StartIP : DHCP_IPV6_ADDRESS -> "buffer"
// EndIP : DHCP_IPV6_ADDRESS -> "buffer"
// NumFreeAddrReq : DWORD -> "u32"
// IPAddrList : DHCPV6_IP_ARRAY** out -> "pointer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
uint32_t DhcpV6GetFreeIPAddress(
    const uint16_t* ServerIpAddress,
    DHCP_IPV6_ADDRESS ScopeId,
    DHCP_IPV6_ADDRESS StartIP,
    DHCP_IPV6_ADDRESS EndIP,
    uint32_t NumFreeAddrReq,
    void* IPAddrList);
C, "DHCPSAPI.dll");
// $ffi->DhcpV6GetFreeIPAddress(ServerIpAddress, ScopeId, StartIP, EndIP, NumFreeAddrReq, IPAddrList);
// ServerIpAddress : LPWSTR optional
// ScopeId : DHCP_IPV6_ADDRESS
// StartIP : DHCP_IPV6_ADDRESS
// EndIP : DHCP_IPV6_ADDRESS
// NumFreeAddrReq : DWORD
// IPAddrList : DHCPV6_IP_ARRAY** 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 Dhcpsapi extends StdCallLibrary {
    Dhcpsapi INSTANCE = Native.load("dhcpsapi", Dhcpsapi.class);
    int DhcpV6GetFreeIPAddress(
        WString ServerIpAddress,   // LPWSTR optional
        DHCP_IPV6_ADDRESS /* extends Structure (by value) */ ScopeId,   // DHCP_IPV6_ADDRESS
        DHCP_IPV6_ADDRESS /* extends Structure (by value) */ StartIP,   // DHCP_IPV6_ADDRESS
        DHCP_IPV6_ADDRESS /* extends Structure (by value) */ EndIP,   // DHCP_IPV6_ADDRESS
        int NumFreeAddrReq,   // DWORD
        Pointer IPAddrList   // DHCPV6_IP_ARRAY** out
    );
}

@[Link("dhcpsapi")]
lib LibDHCPSAPI
  fun DhcpV6GetFreeIPAddress = DhcpV6GetFreeIPAddress(
    ServerIpAddress : UInt16*,   # LPWSTR optional
    ScopeId : DHCP_IPV6_ADDRESS,   # DHCP_IPV6_ADDRESS
    StartIP : DHCP_IPV6_ADDRESS,   # DHCP_IPV6_ADDRESS
    EndIP : DHCP_IPV6_ADDRESS,   # DHCP_IPV6_ADDRESS
    NumFreeAddrReq : UInt32,   # DWORD
    IPAddrList : DHCPV6_IP_ARRAY**   # DHCPV6_IP_ARRAY** 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 DhcpV6GetFreeIPAddressNative = Uint32 Function(Pointer<Utf16>, DHCP_IPV6_ADDRESS, DHCP_IPV6_ADDRESS, DHCP_IPV6_ADDRESS, Uint32, Pointer<Void>);
typedef DhcpV6GetFreeIPAddressDart = int Function(Pointer<Utf16>, int, int, int, int, Pointer<Void>);
final DhcpV6GetFreeIPAddress = DynamicLibrary.open('DHCPSAPI.dll')
    .lookupFunction<DhcpV6GetFreeIPAddressNative, DhcpV6GetFreeIPAddressDart>('DhcpV6GetFreeIPAddress');
// ServerIpAddress : LPWSTR optional -> Pointer<Utf16>
// ScopeId : DHCP_IPV6_ADDRESS -> DHCP_IPV6_ADDRESS
// StartIP : DHCP_IPV6_ADDRESS -> DHCP_IPV6_ADDRESS
// EndIP : DHCP_IPV6_ADDRESS -> DHCP_IPV6_ADDRESS
// NumFreeAddrReq : DWORD -> Uint32
// IPAddrList : DHCPV6_IP_ARRAY** out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DhcpV6GetFreeIPAddress(
  ServerIpAddress: PWideChar;   // LPWSTR optional
  ScopeId: DHCP_IPV6_ADDRESS;   // DHCP_IPV6_ADDRESS
  StartIP: DHCP_IPV6_ADDRESS;   // DHCP_IPV6_ADDRESS
  EndIP: DHCP_IPV6_ADDRESS;   // DHCP_IPV6_ADDRESS
  NumFreeAddrReq: DWORD;   // DWORD
  IPAddrList: Pointer   // DHCPV6_IP_ARRAY** out
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpV6GetFreeIPAddress';

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

foreign import stdcall safe "DhcpV6GetFreeIPAddress"
  c_DhcpV6GetFreeIPAddress :: CWString -> DHCP_IPV6_ADDRESS -> DHCP_IPV6_ADDRESS -> DHCP_IPV6_ADDRESS -> Word32 -> Ptr () -> IO Word32
-- ServerIpAddress : LPWSTR optional -> CWString
-- ScopeId : DHCP_IPV6_ADDRESS -> DHCP_IPV6_ADDRESS
-- StartIP : DHCP_IPV6_ADDRESS -> DHCP_IPV6_ADDRESS
-- EndIP : DHCP_IPV6_ADDRESS -> DHCP_IPV6_ADDRESS
-- NumFreeAddrReq : DWORD -> Word32
-- IPAddrList : DHCPV6_IP_ARRAY** out -> Ptr ()
-- 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。
-- ※値渡し構造体は GHC FFI で直接渡せません。Ptr で渡すラッパ(C側)経由にしてください。

open Ctypes
open Foreign

let dhcpv6getfreeipaddress =
  foreign "DhcpV6GetFreeIPAddress"
    ((ptr uint16_t) @-> DHCP_IPV6_ADDRESS @-> DHCP_IPV6_ADDRESS @-> DHCP_IPV6_ADDRESS @-> uint32_t @-> (ptr void) @-> returning uint32_t)
(* ServerIpAddress : LPWSTR optional -> (ptr uint16_t) *)
(* ScopeId : DHCP_IPV6_ADDRESS -> DHCP_IPV6_ADDRESS *)
(* StartIP : DHCP_IPV6_ADDRESS -> DHCP_IPV6_ADDRESS *)
(* EndIP : DHCP_IPV6_ADDRESS -> DHCP_IPV6_ADDRESS *)
(* NumFreeAddrReq : DWORD -> uint32_t *)
(* IPAddrList : DHCPV6_IP_ARRAY** out -> (ptr void) *)
(* 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 dhcpsapi (t "DHCPSAPI.dll"))
(cffi:use-foreign-library dhcpsapi)

(cffi:defcfun ("DhcpV6GetFreeIPAddress" dhcp-v6-get-free-ipaddress :convention :stdcall) :uint32
  (server-ip-address (:string :encoding :utf-16le))   ; LPWSTR optional
  (scope-id (:struct dhcp-ipv6-address))   ; DHCP_IPV6_ADDRESS
  (start-ip (:struct dhcp-ipv6-address))   ; DHCP_IPV6_ADDRESS
  (end-ip (:struct dhcp-ipv6-address))   ; DHCP_IPV6_ADDRESS
  (num-free-addr-req :uint32)   ; DWORD
  (ipaddr-list :pointer))   ; DHCPV6_IP_ARRAY** out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $DhcpV6GetFreeIPAddress = Win32::API::More->new('DHCPSAPI',
    'DWORD DhcpV6GetFreeIPAddress(LPCWSTR ServerIpAddress, LPVOID ScopeId, LPVOID StartIP, LPVOID EndIP, DWORD NumFreeAddrReq, LPVOID IPAddrList)');
# my $ret = $DhcpV6GetFreeIPAddress->Call($ServerIpAddress, $ScopeId, $StartIP, $EndIP, $NumFreeAddrReq, $IPAddrList);
# ServerIpAddress : LPWSTR optional -> LPCWSTR
# ScopeId : DHCP_IPV6_ADDRESS -> LPVOID
# StartIP : DHCP_IPV6_ADDRESS -> LPVOID
# EndIP : DHCP_IPV6_ADDRESS -> LPVOID
# NumFreeAddrReq : DWORD -> DWORD
# IPAddrList : DHCPV6_IP_ARRAY** out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。