DhcpGetServerBindingInfoV6

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

DWORD DhcpGetServerBindingInfoV6(
    LPCWSTR ServerIpAddress,   // optional
    DWORD Flags,
    DHCPV6_BIND_ELEMENT_ARRAY** BindElementsInfo
);

<DllImport("DHCPSAPI.dll", ExactSpelling:=True)>
Public Shared Function DhcpGetServerBindingInfoV6(
    <MarshalAs(UnmanagedType.LPWStr)> ServerIpAddress As String,   ' LPCWSTR optional
    Flags As UInteger,   ' DWORD
    BindElementsInfo As IntPtr   ' DHCPV6_BIND_ELEMENT_ARRAY** in/out
) As UInteger
End Function

' ServerIpAddress : LPCWSTR optional
' Flags : DWORD
' BindElementsInfo : DHCPV6_BIND_ELEMENT_ARRAY** in/out
Declare PtrSafe Function DhcpGetServerBindingInfoV6 Lib "dhcpsapi" ( _
    ByVal ServerIpAddress As LongPtr, _
    ByVal Flags As Long, _
    ByVal BindElementsInfo 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

DhcpGetServerBindingInfoV6 = ctypes.windll.dhcpsapi.DhcpGetServerBindingInfoV6
DhcpGetServerBindingInfoV6.restype = wintypes.DWORD
DhcpGetServerBindingInfoV6.argtypes = [
    wintypes.LPCWSTR,  # ServerIpAddress : LPCWSTR optional
    wintypes.DWORD,  # Flags : DWORD
    ctypes.c_void_p,  # BindElementsInfo : DHCPV6_BIND_ELEMENT_ARRAY** in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DHCPSAPI.dll')
DhcpGetServerBindingInfoV6 = Fiddle::Function.new(
  lib['DhcpGetServerBindingInfoV6'],
  [
    Fiddle::TYPE_VOIDP,  # ServerIpAddress : LPCWSTR optional
    -Fiddle::TYPE_INT,  # Flags : DWORD
    Fiddle::TYPE_VOIDP,  # BindElementsInfo : DHCPV6_BIND_ELEMENT_ARRAY** in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpsapi")]
extern "system" {
    fn DhcpGetServerBindingInfoV6(
        ServerIpAddress: *const u16,  // LPCWSTR optional
        Flags: u32,  // DWORD
        BindElementsInfo: *mut *mut DHCPV6_BIND_ELEMENT_ARRAY  // DHCPV6_BIND_ELEMENT_ARRAY** in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DHCPSAPI.dll")]
public static extern uint DhcpGetServerBindingInfoV6([MarshalAs(UnmanagedType.LPWStr)] string ServerIpAddress, uint Flags, IntPtr BindElementsInfo);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DHCPSAPI_DhcpGetServerBindingInfoV6' -Namespace Win32 -PassThru
# $api::DhcpGetServerBindingInfoV6(ServerIpAddress, Flags, BindElementsInfo)

#uselib "DHCPSAPI.dll"
#func global DhcpGetServerBindingInfoV6 "DhcpGetServerBindingInfoV6" sptr, sptr, sptr
; DhcpGetServerBindingInfoV6 ServerIpAddress, Flags, varptr(BindElementsInfo)   ; 戻り値は stat
; ServerIpAddress : LPCWSTR optional -> "sptr"
; Flags : DWORD -> "sptr"
; BindElementsInfo : DHCPV6_BIND_ELEMENT_ARRAY** in/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 "DHCPSAPI.dll"
#cfunc global DhcpGetServerBindingInfoV6 "DhcpGetServerBindingInfoV6" wstr, int, var
; res = DhcpGetServerBindingInfoV6(ServerIpAddress, Flags, BindElementsInfo)
; ServerIpAddress : LPCWSTR optional -> "wstr"
; Flags : DWORD -> "int"
; BindElementsInfo : DHCPV6_BIND_ELEMENT_ARRAY** in/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。

; DWORD DhcpGetServerBindingInfoV6(LPCWSTR ServerIpAddress, DWORD Flags, DHCPV6_BIND_ELEMENT_ARRAY** BindElementsInfo)
#uselib "DHCPSAPI.dll"
#cfunc global DhcpGetServerBindingInfoV6 "DhcpGetServerBindingInfoV6" wstr, int, var
; res = DhcpGetServerBindingInfoV6(ServerIpAddress, Flags, BindElementsInfo)
; ServerIpAddress : LPCWSTR optional -> "wstr"
; Flags : DWORD -> "int"
; BindElementsInfo : DHCPV6_BIND_ELEMENT_ARRAY** in/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 (
	dhcpsapi = windows.NewLazySystemDLL("DHCPSAPI.dll")
	procDhcpGetServerBindingInfoV6 = dhcpsapi.NewProc("DhcpGetServerBindingInfoV6")
)

// ServerIpAddress (LPCWSTR optional), Flags (DWORD), BindElementsInfo (DHCPV6_BIND_ELEMENT_ARRAY** in/out)
r1, _, err := procDhcpGetServerBindingInfoV6.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServerIpAddress))),
	uintptr(Flags),
	uintptr(BindElementsInfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpGetServerBindingInfoV6(
  ServerIpAddress: PWideChar;   // LPCWSTR optional
  Flags: DWORD;   // DWORD
  BindElementsInfo: Pointer   // DHCPV6_BIND_ELEMENT_ARRAY** in/out
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpGetServerBindingInfoV6';

result := DllCall("DHCPSAPI\DhcpGetServerBindingInfoV6"
    , "WStr", ServerIpAddress   ; LPCWSTR optional
    , "UInt", Flags   ; DWORD
    , "Ptr", BindElementsInfo   ; DHCPV6_BIND_ELEMENT_ARRAY** in/out
    , "UInt")   ; return: DWORD

●DhcpGetServerBindingInfoV6(ServerIpAddress, Flags, BindElementsInfo) = DLL("DHCPSAPI.dll", "dword DhcpGetServerBindingInfoV6(char*, dword, void*)")
# 呼び出し: DhcpGetServerBindingInfoV6(ServerIpAddress, Flags, BindElementsInfo)
# ServerIpAddress : LPCWSTR optional -> "char*"
# Flags : DWORD -> "dword"
# BindElementsInfo : DHCPV6_BIND_ELEMENT_ARRAY** 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)。