DhcpAddSubnetElementV6

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

DWORD DhcpAddSubnetElementV6(
    LPWSTR ServerIpAddress,   // optional
    DHCP_IPV6_ADDRESS SubnetAddress,
    DHCP_SUBNET_ELEMENT_DATA_V6* AddElementInfo
);

<DllImport("DHCPSAPI.dll", ExactSpelling:=True)>
Public Shared Function DhcpAddSubnetElementV6(
    <MarshalAs(UnmanagedType.LPWStr)> ServerIpAddress As String,   ' LPWSTR optional
    SubnetAddress As DHCP_IPV6_ADDRESS,   ' DHCP_IPV6_ADDRESS
    AddElementInfo As IntPtr   ' DHCP_SUBNET_ELEMENT_DATA_V6* in/out
) As UInteger
End Function

' ServerIpAddress : LPWSTR optional
' SubnetAddress : DHCP_IPV6_ADDRESS
' AddElementInfo : DHCP_SUBNET_ELEMENT_DATA_V6* in/out
Declare PtrSafe Function DhcpAddSubnetElementV6 Lib "dhcpsapi" ( _
    ByVal ServerIpAddress As LongPtr, _
    ByVal SubnetAddress As LongPtr, _
    ByVal AddElementInfo 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

DhcpAddSubnetElementV6 = ctypes.windll.dhcpsapi.DhcpAddSubnetElementV6
DhcpAddSubnetElementV6.restype = wintypes.DWORD
DhcpAddSubnetElementV6.argtypes = [
    wintypes.LPCWSTR,  # ServerIpAddress : LPWSTR optional
    DHCP_IPV6_ADDRESS,  # SubnetAddress : DHCP_IPV6_ADDRESS
    ctypes.c_void_p,  # AddElementInfo : DHCP_SUBNET_ELEMENT_DATA_V6* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DHCPSAPI.dll')
DhcpAddSubnetElementV6 = Fiddle::Function.new(
  lib['DhcpAddSubnetElementV6'],
  [
    Fiddle::TYPE_VOIDP,  # ServerIpAddress : LPWSTR optional
    Fiddle::TYPE_VOIDP,  # SubnetAddress : DHCP_IPV6_ADDRESS
    Fiddle::TYPE_VOIDP,  # AddElementInfo : DHCP_SUBNET_ELEMENT_DATA_V6* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpsapi")]
extern "system" {
    fn DhcpAddSubnetElementV6(
        ServerIpAddress: *mut u16,  // LPWSTR optional
        SubnetAddress: DHCP_IPV6_ADDRESS,  // DHCP_IPV6_ADDRESS
        AddElementInfo: *mut DHCP_SUBNET_ELEMENT_DATA_V6  // DHCP_SUBNET_ELEMENT_DATA_V6* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DHCPSAPI.dll")]
public static extern uint DhcpAddSubnetElementV6([MarshalAs(UnmanagedType.LPWStr)] string ServerIpAddress, DHCP_IPV6_ADDRESS SubnetAddress, IntPtr AddElementInfo);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DHCPSAPI_DhcpAddSubnetElementV6' -Namespace Win32 -PassThru
# $api::DhcpAddSubnetElementV6(ServerIpAddress, SubnetAddress, AddElementInfo)

#uselib "DHCPSAPI.dll"
#func global DhcpAddSubnetElementV6 "DhcpAddSubnetElementV6" sptr, sptr, sptr
; DhcpAddSubnetElementV6 ServerIpAddress, SubnetAddress, varptr(AddElementInfo)   ; 戻り値は stat
; ServerIpAddress : LPWSTR optional -> "sptr"
; SubnetAddress : DHCP_IPV6_ADDRESS -> "sptr"
; AddElementInfo : DHCP_SUBNET_ELEMENT_DATA_V6* in/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。

#uselib "DHCPSAPI.dll"
#cfunc global DhcpAddSubnetElementV6 "DhcpAddSubnetElementV6" wstr, int, var
; res = DhcpAddSubnetElementV6(ServerIpAddress, SubnetAddress, AddElementInfo)
; ServerIpAddress : LPWSTR optional -> "wstr"
; SubnetAddress : DHCP_IPV6_ADDRESS -> "int"
; AddElementInfo : DHCP_SUBNET_ELEMENT_DATA_V6* in/out -> "var"
; ※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。
; ※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。

; DWORD DhcpAddSubnetElementV6(LPWSTR ServerIpAddress, DHCP_IPV6_ADDRESS SubnetAddress, DHCP_SUBNET_ELEMENT_DATA_V6* AddElementInfo)
#uselib "DHCPSAPI.dll"
#cfunc global DhcpAddSubnetElementV6 "DhcpAddSubnetElementV6" wstr, int, var
; res = DhcpAddSubnetElementV6(ServerIpAddress, SubnetAddress, AddElementInfo)
; ServerIpAddress : LPWSTR optional -> "wstr"
; SubnetAddress : DHCP_IPV6_ADDRESS -> "int"
; AddElementInfo : DHCP_SUBNET_ELEMENT_DATA_V6* in/out -> "var"
; ※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。
; ※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 (
	dhcpsapi = windows.NewLazySystemDLL("DHCPSAPI.dll")
	procDhcpAddSubnetElementV6 = dhcpsapi.NewProc("DhcpAddSubnetElementV6")
)

// ServerIpAddress (LPWSTR optional), SubnetAddress (DHCP_IPV6_ADDRESS), AddElementInfo (DHCP_SUBNET_ELEMENT_DATA_V6* in/out)
r1, _, err := procDhcpAddSubnetElementV6.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServerIpAddress))),
	uintptr(SubnetAddress),
	uintptr(AddElementInfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpAddSubnetElementV6(
  ServerIpAddress: PWideChar;   // LPWSTR optional
  SubnetAddress: DHCP_IPV6_ADDRESS;   // DHCP_IPV6_ADDRESS
  AddElementInfo: Pointer   // DHCP_SUBNET_ELEMENT_DATA_V6* in/out
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpAddSubnetElementV6';

result := DllCall("DHCPSAPI\DhcpAddSubnetElementV6"
    , "WStr", ServerIpAddress   ; LPWSTR optional
    , "Ptr", SubnetAddress   ; DHCP_IPV6_ADDRESS
    , "Ptr", AddElementInfo   ; DHCP_SUBNET_ELEMENT_DATA_V6* in/out
    , "UInt")   ; return: DWORD

●DhcpAddSubnetElementV6(ServerIpAddress, SubnetAddress, AddElementInfo) = DLL("DHCPSAPI.dll", "dword DhcpAddSubnetElementV6(char*, void*, void*)")
# 呼び出し: DhcpAddSubnetElementV6(ServerIpAddress, SubnetAddress, AddElementInfo)
# ServerIpAddress : LPWSTR optional -> "char*"
# SubnetAddress : DHCP_IPV6_ADDRESS -> "void*"
# AddElementInfo : DHCP_SUBNET_ELEMENT_DATA_V6* in/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)。