DhcpServerQueryAttribute

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

DWORD DhcpServerQueryAttribute(
    LPWSTR ServerIpAddr,   // optional
    DWORD dwReserved,
    DWORD DhcpAttribId,
    DHCP_ATTRIB** pDhcpAttrib
);

<DllImport("DHCPSAPI.dll", ExactSpelling:=True)>
Public Shared Function DhcpServerQueryAttribute(
    <MarshalAs(UnmanagedType.LPWStr)> ServerIpAddr As String,   ' LPWSTR optional
    dwReserved As UInteger,   ' DWORD
    DhcpAttribId As UInteger,   ' DWORD
    pDhcpAttrib As IntPtr   ' DHCP_ATTRIB** in/out
) As UInteger
End Function

' ServerIpAddr : LPWSTR optional
' dwReserved : DWORD
' DhcpAttribId : DWORD
' pDhcpAttrib : DHCP_ATTRIB** in/out
Declare PtrSafe Function DhcpServerQueryAttribute Lib "dhcpsapi" ( _
    ByVal ServerIpAddr As LongPtr, _
    ByVal dwReserved As Long, _
    ByVal DhcpAttribId As Long, _
    ByVal pDhcpAttrib 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

DhcpServerQueryAttribute = ctypes.windll.dhcpsapi.DhcpServerQueryAttribute
DhcpServerQueryAttribute.restype = wintypes.DWORD
DhcpServerQueryAttribute.argtypes = [
    wintypes.LPCWSTR,  # ServerIpAddr : LPWSTR optional
    wintypes.DWORD,  # dwReserved : DWORD
    wintypes.DWORD,  # DhcpAttribId : DWORD
    ctypes.c_void_p,  # pDhcpAttrib : DHCP_ATTRIB** in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DHCPSAPI.dll')
DhcpServerQueryAttribute = Fiddle::Function.new(
  lib['DhcpServerQueryAttribute'],
  [
    Fiddle::TYPE_VOIDP,  # ServerIpAddr : LPWSTR optional
    -Fiddle::TYPE_INT,  # dwReserved : DWORD
    -Fiddle::TYPE_INT,  # DhcpAttribId : DWORD
    Fiddle::TYPE_VOIDP,  # pDhcpAttrib : DHCP_ATTRIB** in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpsapi")]
extern "system" {
    fn DhcpServerQueryAttribute(
        ServerIpAddr: *mut u16,  // LPWSTR optional
        dwReserved: u32,  // DWORD
        DhcpAttribId: u32,  // DWORD
        pDhcpAttrib: *mut *mut DHCP_ATTRIB  // DHCP_ATTRIB** in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DHCPSAPI.dll")]
public static extern uint DhcpServerQueryAttribute([MarshalAs(UnmanagedType.LPWStr)] string ServerIpAddr, uint dwReserved, uint DhcpAttribId, IntPtr pDhcpAttrib);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DHCPSAPI_DhcpServerQueryAttribute' -Namespace Win32 -PassThru
# $api::DhcpServerQueryAttribute(ServerIpAddr, dwReserved, DhcpAttribId, pDhcpAttrib)

#uselib "DHCPSAPI.dll"
#func global DhcpServerQueryAttribute "DhcpServerQueryAttribute" sptr, sptr, sptr, sptr
; DhcpServerQueryAttribute ServerIpAddr, dwReserved, DhcpAttribId, varptr(pDhcpAttrib)   ; 戻り値は stat
; ServerIpAddr : LPWSTR optional -> "sptr"
; dwReserved : DWORD -> "sptr"
; DhcpAttribId : DWORD -> "sptr"
; pDhcpAttrib : DHCP_ATTRIB** 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")
	procDhcpServerQueryAttribute = dhcpsapi.NewProc("DhcpServerQueryAttribute")
)

// ServerIpAddr (LPWSTR optional), dwReserved (DWORD), DhcpAttribId (DWORD), pDhcpAttrib (DHCP_ATTRIB** in/out)
r1, _, err := procDhcpServerQueryAttribute.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServerIpAddr))),
	uintptr(dwReserved),
	uintptr(DhcpAttribId),
	uintptr(pDhcpAttrib),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpServerQueryAttribute(
  ServerIpAddr: PWideChar;   // LPWSTR optional
  dwReserved: DWORD;   // DWORD
  DhcpAttribId: DWORD;   // DWORD
  pDhcpAttrib: Pointer   // DHCP_ATTRIB** in/out
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpServerQueryAttribute';

result := DllCall("DHCPSAPI\DhcpServerQueryAttribute"
    , "WStr", ServerIpAddr   ; LPWSTR optional
    , "UInt", dwReserved   ; DWORD
    , "UInt", DhcpAttribId   ; DWORD
    , "Ptr", pDhcpAttrib   ; DHCP_ATTRIB** in/out
    , "UInt")   ; return: DWORD

●DhcpServerQueryAttribute(ServerIpAddr, dwReserved, DhcpAttribId, pDhcpAttrib) = DLL("DHCPSAPI.dll", "dword DhcpServerQueryAttribute(char*, dword, dword, void*)")
# 呼び出し: DhcpServerQueryAttribute(ServerIpAddr, dwReserved, DhcpAttribId, pDhcpAttrib)
# ServerIpAddr : LPWSTR optional -> "char*"
# dwReserved : DWORD -> "dword"
# DhcpAttribId : DWORD -> "dword"
# pDhcpAttrib : DHCP_ATTRIB** 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 DhcpServerQueryAttribute(
    ServerIpAddr: [*c]const u16, // LPWSTR optional
    dwReserved: u32, // DWORD
    DhcpAttribId: u32, // DWORD
    pDhcpAttrib: [*c][*c]DHCP_ATTRIB // DHCP_ATTRIB** in/out
) callconv(std.os.windows.WINAPI) u32;

proc DhcpServerQueryAttribute(
    ServerIpAddr: WideCString,  # LPWSTR optional
    dwReserved: uint32,  # DWORD
    DhcpAttribId: uint32,  # DWORD
    pDhcpAttrib: ptr DHCP_ATTRIB  # DHCP_ATTRIB** in/out
): uint32 {.importc: "DhcpServerQueryAttribute", stdcall, dynlib: "DHCPSAPI.dll".}

pragma(lib, "dhcpsapi");
extern(Windows)
uint DhcpServerQueryAttribute(
    const(wchar)* ServerIpAddr,   // LPWSTR optional
    uint dwReserved,   // DWORD
    uint DhcpAttribId,   // DWORD
    DHCP_ATTRIB** pDhcpAttrib   // DHCP_ATTRIB** in/out
);

ccall((:DhcpServerQueryAttribute, "DHCPSAPI.dll"), stdcall, UInt32,
      (Cwstring, UInt32, UInt32, Ptr{DHCP_ATTRIB}),
      ServerIpAddr, dwReserved, DhcpAttribId, pDhcpAttrib)
# ServerIpAddr : LPWSTR optional -> Cwstring
# dwReserved : DWORD -> UInt32
# DhcpAttribId : DWORD -> UInt32
# pDhcpAttrib : DHCP_ATTRIB** in/out -> Ptr{DHCP_ATTRIB}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t DhcpServerQueryAttribute(
    const uint16_t* ServerIpAddr,
    uint32_t dwReserved,
    uint32_t DhcpAttribId,
    void* pDhcpAttrib);
]]
local dhcpsapi = ffi.load("dhcpsapi")
-- dhcpsapi.DhcpServerQueryAttribute(ServerIpAddr, dwReserved, DhcpAttribId, pDhcpAttrib)
-- ServerIpAddr : LPWSTR optional
-- dwReserved : DWORD
-- DhcpAttribId : DWORD
-- pDhcpAttrib : DHCP_ATTRIB** 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 DhcpServerQueryAttribute = lib.func('__stdcall', 'DhcpServerQueryAttribute', 'uint32_t', ['str16', 'uint32_t', 'uint32_t', 'void *']);
// DhcpServerQueryAttribute(ServerIpAddr, dwReserved, DhcpAttribId, pDhcpAttrib)
// ServerIpAddr : LPWSTR optional -> 'str16'
// dwReserved : DWORD -> 'uint32_t'
// DhcpAttribId : DWORD -> 'uint32_t'
// pDhcpAttrib : DHCP_ATTRIB** 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", {
  DhcpServerQueryAttribute: { parameters: ["buffer", "u32", "u32", "pointer"], result: "u32" },
});
// lib.symbols.DhcpServerQueryAttribute(ServerIpAddr, dwReserved, DhcpAttribId, pDhcpAttrib)
// ServerIpAddr : LPWSTR optional -> "buffer"
// dwReserved : DWORD -> "u32"
// DhcpAttribId : DWORD -> "u32"
// pDhcpAttrib : DHCP_ATTRIB** 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 DhcpServerQueryAttribute(
    const uint16_t* ServerIpAddr,
    uint32_t dwReserved,
    uint32_t DhcpAttribId,
    void* pDhcpAttrib);
C, "DHCPSAPI.dll");
// $ffi->DhcpServerQueryAttribute(ServerIpAddr, dwReserved, DhcpAttribId, pDhcpAttrib);
// ServerIpAddr : LPWSTR optional
// dwReserved : DWORD
// DhcpAttribId : DWORD
// pDhcpAttrib : DHCP_ATTRIB** 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 DhcpServerQueryAttribute(
        WString ServerIpAddr,   // LPWSTR optional
        int dwReserved,   // DWORD
        int DhcpAttribId,   // DWORD
        Pointer pDhcpAttrib   // DHCP_ATTRIB** in/out
    );
}

@[Link("dhcpsapi")]
lib LibDHCPSAPI
  fun DhcpServerQueryAttribute = DhcpServerQueryAttribute(
    ServerIpAddr : UInt16*,   # LPWSTR optional
    dwReserved : UInt32,   # DWORD
    DhcpAttribId : UInt32,   # DWORD
    pDhcpAttrib : DHCP_ATTRIB**   # DHCP_ATTRIB** 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 DhcpServerQueryAttributeNative = Uint32 Function(Pointer<Utf16>, Uint32, Uint32, Pointer<Void>);
typedef DhcpServerQueryAttributeDart = int Function(Pointer<Utf16>, int, int, Pointer<Void>);
final DhcpServerQueryAttribute = DynamicLibrary.open('DHCPSAPI.dll')
    .lookupFunction<DhcpServerQueryAttributeNative, DhcpServerQueryAttributeDart>('DhcpServerQueryAttribute');
// ServerIpAddr : LPWSTR optional -> Pointer<Utf16>
// dwReserved : DWORD -> Uint32
// DhcpAttribId : DWORD -> Uint32
// pDhcpAttrib : DHCP_ATTRIB** in/out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DhcpServerQueryAttribute(
  ServerIpAddr: PWideChar;   // LPWSTR optional
  dwReserved: DWORD;   // DWORD
  DhcpAttribId: DWORD;   // DWORD
  pDhcpAttrib: Pointer   // DHCP_ATTRIB** in/out
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpServerQueryAttribute';

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

foreign import stdcall safe "DhcpServerQueryAttribute"
  c_DhcpServerQueryAttribute :: CWString -> Word32 -> Word32 -> Ptr () -> IO Word32
-- ServerIpAddr : LPWSTR optional -> CWString
-- dwReserved : DWORD -> Word32
-- DhcpAttribId : DWORD -> Word32
-- pDhcpAttrib : DHCP_ATTRIB** 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 dhcpserverqueryattribute =
  foreign "DhcpServerQueryAttribute"
    ((ptr uint16_t) @-> uint32_t @-> uint32_t @-> (ptr void) @-> returning uint32_t)
(* ServerIpAddr : LPWSTR optional -> (ptr uint16_t) *)
(* dwReserved : DWORD -> uint32_t *)
(* DhcpAttribId : DWORD -> uint32_t *)
(* pDhcpAttrib : DHCP_ATTRIB** 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 ("DhcpServerQueryAttribute" dhcp-server-query-attribute :convention :stdcall) :uint32
  (server-ip-addr (:string :encoding :utf-16le))   ; LPWSTR optional
  (dw-reserved :uint32)   ; DWORD
  (dhcp-attrib-id :uint32)   ; DWORD
  (p-dhcp-attrib :pointer))   ; DHCP_ATTRIB** in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $DhcpServerQueryAttribute = Win32::API::More->new('DHCPSAPI',
    'DWORD DhcpServerQueryAttribute(LPCWSTR ServerIpAddr, DWORD dwReserved, DWORD DhcpAttribId, LPVOID pDhcpAttrib)');
# my $ret = $DhcpServerQueryAttribute->Call($ServerIpAddr, $dwReserved, $DhcpAttribId, $pDhcpAttrib);
# ServerIpAddr : LPWSTR optional -> LPCWSTR
# dwReserved : DWORD -> DWORD
# DhcpAttribId : DWORD -> DWORD
# pDhcpAttrib : DHCP_ATTRIB** 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。