DhcpEnumServers

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

DWORD DhcpEnumServers(
    DWORD Flags,
    void* IdInfo,
    DHCPDS_SERVERS** Servers,
    void* CallbackFn,
    void* CallbackData
);

<DllImport("DHCPSAPI.dll", ExactSpelling:=True)>
Public Shared Function DhcpEnumServers(
    Flags As UInteger,   ' DWORD
    IdInfo As IntPtr,   ' void* in/out
    Servers As IntPtr,   ' DHCPDS_SERVERS** in/out
    CallbackFn As IntPtr,   ' void* in/out
    CallbackData As IntPtr   ' void* in/out
) As UInteger
End Function

' Flags : DWORD
' IdInfo : void* in/out
' Servers : DHCPDS_SERVERS** in/out
' CallbackFn : void* in/out
' CallbackData : void* in/out
Declare PtrSafe Function DhcpEnumServers Lib "dhcpsapi" ( _
    ByVal Flags As Long, _
    ByVal IdInfo As LongPtr, _
    ByVal Servers As LongPtr, _
    ByVal CallbackFn As LongPtr, _
    ByVal CallbackData 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

DhcpEnumServers = ctypes.windll.dhcpsapi.DhcpEnumServers
DhcpEnumServers.restype = wintypes.DWORD
DhcpEnumServers.argtypes = [
    wintypes.DWORD,  # Flags : DWORD
    ctypes.POINTER(None),  # IdInfo : void* in/out
    ctypes.c_void_p,  # Servers : DHCPDS_SERVERS** in/out
    ctypes.POINTER(None),  # CallbackFn : void* in/out
    ctypes.POINTER(None),  # CallbackData : void* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DHCPSAPI.dll')
DhcpEnumServers = Fiddle::Function.new(
  lib['DhcpEnumServers'],
  [
    -Fiddle::TYPE_INT,  # Flags : DWORD
    Fiddle::TYPE_VOIDP,  # IdInfo : void* in/out
    Fiddle::TYPE_VOIDP,  # Servers : DHCPDS_SERVERS** in/out
    Fiddle::TYPE_VOIDP,  # CallbackFn : void* in/out
    Fiddle::TYPE_VOIDP,  # CallbackData : void* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpsapi")]
extern "system" {
    fn DhcpEnumServers(
        Flags: u32,  // DWORD
        IdInfo: *mut (),  // void* in/out
        Servers: *mut *mut DHCPDS_SERVERS,  // DHCPDS_SERVERS** in/out
        CallbackFn: *mut (),  // void* in/out
        CallbackData: *mut ()  // void* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DHCPSAPI.dll")]
public static extern uint DhcpEnumServers(uint Flags, IntPtr IdInfo, IntPtr Servers, IntPtr CallbackFn, IntPtr CallbackData);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DHCPSAPI_DhcpEnumServers' -Namespace Win32 -PassThru
# $api::DhcpEnumServers(Flags, IdInfo, Servers, CallbackFn, CallbackData)

#uselib "DHCPSAPI.dll"
#func global DhcpEnumServers "DhcpEnumServers" sptr, sptr, sptr, sptr, sptr
; DhcpEnumServers Flags, IdInfo, varptr(Servers), CallbackFn, CallbackData   ; 戻り値は stat
; Flags : DWORD -> "sptr"
; IdInfo : void* in/out -> "sptr"
; Servers : DHCPDS_SERVERS** in/out -> "sptr"
; CallbackFn : void* in/out -> "sptr"
; CallbackData : void* 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。

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

var (
	dhcpsapi = windows.NewLazySystemDLL("DHCPSAPI.dll")
	procDhcpEnumServers = dhcpsapi.NewProc("DhcpEnumServers")
)

// Flags (DWORD), IdInfo (void* in/out), Servers (DHCPDS_SERVERS** in/out), CallbackFn (void* in/out), CallbackData (void* in/out)
r1, _, err := procDhcpEnumServers.Call(
	uintptr(Flags),
	uintptr(IdInfo),
	uintptr(Servers),
	uintptr(CallbackFn),
	uintptr(CallbackData),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpEnumServers(
  Flags: DWORD;   // DWORD
  IdInfo: Pointer;   // void* in/out
  Servers: Pointer;   // DHCPDS_SERVERS** in/out
  CallbackFn: Pointer;   // void* in/out
  CallbackData: Pointer   // void* in/out
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpEnumServers';

result := DllCall("DHCPSAPI\DhcpEnumServers"
    , "UInt", Flags   ; DWORD
    , "Ptr", IdInfo   ; void* in/out
    , "Ptr", Servers   ; DHCPDS_SERVERS** in/out
    , "Ptr", CallbackFn   ; void* in/out
    , "Ptr", CallbackData   ; void* in/out
    , "UInt")   ; return: DWORD

●DhcpEnumServers(Flags, IdInfo, Servers, CallbackFn, CallbackData) = DLL("DHCPSAPI.dll", "dword DhcpEnumServers(dword, void*, void*, void*, void*)")
# 呼び出し: DhcpEnumServers(Flags, IdInfo, Servers, CallbackFn, CallbackData)
# Flags : DWORD -> "dword"
# IdInfo : void* in/out -> "void*"
# Servers : DHCPDS_SERVERS** in/out -> "void*"
# CallbackFn : void* in/out -> "void*"
# CallbackData : void* 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)。

const std = @import("std");

extern "dhcpsapi" fn DhcpEnumServers(
    Flags: u32, // DWORD
    IdInfo: ?*anyopaque, // void* in/out
    Servers: [*c][*c]DHCPDS_SERVERS, // DHCPDS_SERVERS** in/out
    CallbackFn: ?*anyopaque, // void* in/out
    CallbackData: ?*anyopaque // void* in/out
) callconv(std.os.windows.WINAPI) u32;

proc DhcpEnumServers(
    Flags: uint32,  # DWORD
    IdInfo: pointer,  # void* in/out
    Servers: ptr DHCPDS_SERVERS,  # DHCPDS_SERVERS** in/out
    CallbackFn: pointer,  # void* in/out
    CallbackData: pointer  # void* in/out
): uint32 {.importc: "DhcpEnumServers", stdcall, dynlib: "DHCPSAPI.dll".}

pragma(lib, "dhcpsapi");
extern(Windows)
uint DhcpEnumServers(
    uint Flags,   // DWORD
    void* IdInfo,   // void* in/out
    DHCPDS_SERVERS** Servers,   // DHCPDS_SERVERS** in/out
    void* CallbackFn,   // void* in/out
    void* CallbackData   // void* in/out
);

ccall((:DhcpEnumServers, "DHCPSAPI.dll"), stdcall, UInt32,
      (UInt32, Ptr{Cvoid}, Ptr{DHCPDS_SERVERS}, Ptr{Cvoid}, Ptr{Cvoid}),
      Flags, IdInfo, Servers, CallbackFn, CallbackData)
# Flags : DWORD -> UInt32
# IdInfo : void* in/out -> Ptr{Cvoid}
# Servers : DHCPDS_SERVERS** in/out -> Ptr{DHCPDS_SERVERS}
# CallbackFn : void* in/out -> Ptr{Cvoid}
# CallbackData : void* in/out -> Ptr{Cvoid}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t DhcpEnumServers(
    uint32_t Flags,
    void* IdInfo,
    void* Servers,
    void* CallbackFn,
    void* CallbackData);
]]
local dhcpsapi = ffi.load("dhcpsapi")
-- dhcpsapi.DhcpEnumServers(Flags, IdInfo, Servers, CallbackFn, CallbackData)
-- Flags : DWORD
-- IdInfo : void* in/out
-- Servers : DHCPDS_SERVERS** in/out
-- CallbackFn : void* in/out
-- CallbackData : void* in/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 DhcpEnumServers = lib.func('__stdcall', 'DhcpEnumServers', 'uint32_t', ['uint32_t', 'void *', 'void *', 'void *', 'void *']);
// DhcpEnumServers(Flags, IdInfo, Servers, CallbackFn, CallbackData)
// Flags : DWORD -> 'uint32_t'
// IdInfo : void* in/out -> 'void *'
// Servers : DHCPDS_SERVERS** in/out -> 'void *'
// CallbackFn : void* in/out -> 'void *'
// CallbackData : void* in/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", {
  DhcpEnumServers: { parameters: ["u32", "pointer", "pointer", "pointer", "pointer"], result: "u32" },
});
// lib.symbols.DhcpEnumServers(Flags, IdInfo, Servers, CallbackFn, CallbackData)
// Flags : DWORD -> "u32"
// IdInfo : void* in/out -> "pointer"
// Servers : DHCPDS_SERVERS** in/out -> "pointer"
// CallbackFn : void* in/out -> "pointer"
// CallbackData : void* in/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 DhcpEnumServers(
    uint32_t Flags,
    void* IdInfo,
    void* Servers,
    void* CallbackFn,
    void* CallbackData);
C, "DHCPSAPI.dll");
// $ffi->DhcpEnumServers(Flags, IdInfo, Servers, CallbackFn, CallbackData);
// Flags : DWORD
// IdInfo : void* in/out
// Servers : DHCPDS_SERVERS** in/out
// CallbackFn : void* in/out
// CallbackData : void* in/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 DhcpEnumServers(
        int Flags,   // DWORD
        Pointer IdInfo,   // void* in/out
        Pointer Servers,   // DHCPDS_SERVERS** in/out
        Pointer CallbackFn,   // void* in/out
        Pointer CallbackData   // void* in/out
    );
}

@[Link("dhcpsapi")]
lib LibDHCPSAPI
  fun DhcpEnumServers = DhcpEnumServers(
    Flags : UInt32,   # DWORD
    IdInfo : Void*,   # void* in/out
    Servers : DHCPDS_SERVERS**,   # DHCPDS_SERVERS** in/out
    CallbackFn : Void*,   # void* in/out
    CallbackData : Void*   # void* in/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 DhcpEnumServersNative = Uint32 Function(Uint32, Pointer<Void>, Pointer<Void>, Pointer<Void>, Pointer<Void>);
typedef DhcpEnumServersDart = int Function(int, Pointer<Void>, Pointer<Void>, Pointer<Void>, Pointer<Void>);
final DhcpEnumServers = DynamicLibrary.open('DHCPSAPI.dll')
    .lookupFunction<DhcpEnumServersNative, DhcpEnumServersDart>('DhcpEnumServers');
// Flags : DWORD -> Uint32
// IdInfo : void* in/out -> Pointer<Void>
// Servers : DHCPDS_SERVERS** in/out -> Pointer<Void>
// CallbackFn : void* in/out -> Pointer<Void>
// CallbackData : void* in/out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DhcpEnumServers(
  Flags: DWORD;   // DWORD
  IdInfo: Pointer;   // void* in/out
  Servers: Pointer;   // DHCPDS_SERVERS** in/out
  CallbackFn: Pointer;   // void* in/out
  CallbackData: Pointer   // void* in/out
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpEnumServers';

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

foreign import stdcall safe "DhcpEnumServers"
  c_DhcpEnumServers :: Word32 -> Ptr () -> Ptr () -> Ptr () -> Ptr () -> IO Word32
-- Flags : DWORD -> Word32
-- IdInfo : void* in/out -> Ptr ()
-- Servers : DHCPDS_SERVERS** in/out -> Ptr ()
-- CallbackFn : void* in/out -> Ptr ()
-- CallbackData : void* in/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。

open Ctypes
open Foreign

let dhcpenumservers =
  foreign "DhcpEnumServers"
    (uint32_t @-> (ptr void) @-> (ptr void) @-> (ptr void) @-> (ptr void) @-> returning uint32_t)
(* Flags : DWORD -> uint32_t *)
(* IdInfo : void* in/out -> (ptr void) *)
(* Servers : DHCPDS_SERVERS** in/out -> (ptr void) *)
(* CallbackFn : void* in/out -> (ptr void) *)
(* CallbackData : void* in/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 ("DhcpEnumServers" dhcp-enum-servers :convention :stdcall) :uint32
  (flags :uint32)   ; DWORD
  (id-info :pointer)   ; void* in/out
  (servers :pointer)   ; DHCPDS_SERVERS** in/out
  (callback-fn :pointer)   ; void* in/out
  (callback-data :pointer))   ; void* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $DhcpEnumServers = Win32::API::More->new('DHCPSAPI',
    'DWORD DhcpEnumServers(DWORD Flags, LPVOID IdInfo, LPVOID Servers, LPVOID CallbackFn, LPVOID CallbackData)');
# my $ret = $DhcpEnumServers->Call($Flags, $IdInfo, $Servers, $CallbackFn, $CallbackData);
# Flags : DWORD -> DWORD
# IdInfo : void* in/out -> LPVOID
# Servers : DHCPDS_SERVERS** in/out -> LPVOID
# CallbackFn : void* in/out -> LPVOID
# CallbackData : void* in/out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。