DsGetSpnW

// NTDSAPI.dll  (Unicode / -W)
#include <windows.h>

DWORD DsGetSpnW(
    DS_SPN_NAME_TYPE ServiceType,
    LPCWSTR ServiceClass,
    LPCWSTR ServiceName,   // optional
    WORD InstancePort,
    WORD cInstanceNames,
    LPCWSTR* pInstanceNames,   // optional
    const WORD* pInstancePorts,   // optional
    DWORD* pcSpn,
    LPWSTR** prpszSpn
);

<DllImport("NTDSAPI.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function DsGetSpnW(
    ServiceType As Integer,   ' DS_SPN_NAME_TYPE
    <MarshalAs(UnmanagedType.LPWStr)> ServiceClass As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> ServiceName As String,   ' LPCWSTR optional
    InstancePort As UShort,   ' WORD
    cInstanceNames As UShort,   ' WORD
    pInstanceNames As IntPtr,   ' LPCWSTR* optional
    pInstancePorts As IntPtr,   ' WORD* optional
    <Out> ByRef pcSpn As UInteger,   ' DWORD* out
    prpszSpn As IntPtr   ' LPWSTR** out
) As UInteger
End Function

' ServiceType : DS_SPN_NAME_TYPE
' ServiceClass : LPCWSTR
' ServiceName : LPCWSTR optional
' InstancePort : WORD
' cInstanceNames : WORD
' pInstanceNames : LPCWSTR* optional
' pInstancePorts : WORD* optional
' pcSpn : DWORD* out
' prpszSpn : LPWSTR** out
Declare PtrSafe Function DsGetSpnW Lib "ntdsapi" ( _
    ByVal ServiceType As Long, _
    ByVal ServiceClass As LongPtr, _
    ByVal ServiceName As LongPtr, _
    ByVal InstancePort As Integer, _
    ByVal cInstanceNames As Integer, _
    ByVal pInstanceNames As LongPtr, _
    ByVal pInstancePorts As LongPtr, _
    ByRef pcSpn As Long, _
    ByVal prpszSpn As LongPtr) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

DsGetSpnW = ctypes.windll.ntdsapi.DsGetSpnW
DsGetSpnW.restype = wintypes.DWORD
DsGetSpnW.argtypes = [
    ctypes.c_int,  # ServiceType : DS_SPN_NAME_TYPE
    wintypes.LPCWSTR,  # ServiceClass : LPCWSTR
    wintypes.LPCWSTR,  # ServiceName : LPCWSTR optional
    ctypes.c_ushort,  # InstancePort : WORD
    ctypes.c_ushort,  # cInstanceNames : WORD
    ctypes.c_void_p,  # pInstanceNames : LPCWSTR* optional
    ctypes.POINTER(ctypes.c_ushort),  # pInstancePorts : WORD* optional
    ctypes.POINTER(wintypes.DWORD),  # pcSpn : DWORD* out
    ctypes.c_void_p,  # prpszSpn : LPWSTR** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('NTDSAPI.dll')
DsGetSpnW = Fiddle::Function.new(
  lib['DsGetSpnW'],
  [
    Fiddle::TYPE_INT,  # ServiceType : DS_SPN_NAME_TYPE
    Fiddle::TYPE_VOIDP,  # ServiceClass : LPCWSTR
    Fiddle::TYPE_VOIDP,  # ServiceName : LPCWSTR optional
    -Fiddle::TYPE_SHORT,  # InstancePort : WORD
    -Fiddle::TYPE_SHORT,  # cInstanceNames : WORD
    Fiddle::TYPE_VOIDP,  # pInstanceNames : LPCWSTR* optional
    Fiddle::TYPE_VOIDP,  # pInstancePorts : WORD* optional
    Fiddle::TYPE_VOIDP,  # pcSpn : DWORD* out
    Fiddle::TYPE_VOIDP,  # prpszSpn : LPWSTR** out
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "ntdsapi")]
extern "system" {
    fn DsGetSpnW(
        ServiceType: i32,  // DS_SPN_NAME_TYPE
        ServiceClass: *const u16,  // LPCWSTR
        ServiceName: *const u16,  // LPCWSTR optional
        InstancePort: u16,  // WORD
        cInstanceNames: u16,  // WORD
        pInstanceNames: *const *const u16,  // LPCWSTR* optional
        pInstancePorts: *const u16,  // WORD* optional
        pcSpn: *mut u32,  // DWORD* out
        prpszSpn: *mut *mut *mut u16  // LPWSTR** out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("NTDSAPI.dll", CharSet = CharSet.Unicode)]
public static extern uint DsGetSpnW(int ServiceType, [MarshalAs(UnmanagedType.LPWStr)] string ServiceClass, [MarshalAs(UnmanagedType.LPWStr)] string ServiceName, ushort InstancePort, ushort cInstanceNames, IntPtr pInstanceNames, IntPtr pInstancePorts, out uint pcSpn, IntPtr prpszSpn);
"@
$api = Add-Type -MemberDefinition $sig -Name 'NTDSAPI_DsGetSpnW' -Namespace Win32 -PassThru
# $api::DsGetSpnW(ServiceType, ServiceClass, ServiceName, InstancePort, cInstanceNames, pInstanceNames, pInstancePorts, pcSpn, prpszSpn)

#uselib "NTDSAPI.dll"
#func global DsGetSpnW "DsGetSpnW" wptr, wptr, wptr, wptr, wptr, wptr, wptr, wptr, wptr
; DsGetSpnW ServiceType, ServiceClass, ServiceName, InstancePort, cInstanceNames, varptr(pInstanceNames), varptr(pInstancePorts), varptr(pcSpn), varptr(prpszSpn)   ; 戻り値は stat
; ServiceType : DS_SPN_NAME_TYPE -> "wptr"
; ServiceClass : LPCWSTR -> "wptr"
; ServiceName : LPCWSTR optional -> "wptr"
; InstancePort : WORD -> "wptr"
; cInstanceNames : WORD -> "wptr"
; pInstanceNames : LPCWSTR* optional -> "wptr"
; pInstancePorts : WORD* optional -> "wptr"
; pcSpn : DWORD* out -> "wptr"
; prpszSpn : LPWSTR** out -> "wptr"
; ※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 (
	ntdsapi = windows.NewLazySystemDLL("NTDSAPI.dll")
	procDsGetSpnW = ntdsapi.NewProc("DsGetSpnW")
)

// ServiceType (DS_SPN_NAME_TYPE), ServiceClass (LPCWSTR), ServiceName (LPCWSTR optional), InstancePort (WORD), cInstanceNames (WORD), pInstanceNames (LPCWSTR* optional), pInstancePorts (WORD* optional), pcSpn (DWORD* out), prpszSpn (LPWSTR** out)
r1, _, err := procDsGetSpnW.Call(
	uintptr(ServiceType),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServiceClass))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServiceName))),
	uintptr(InstancePort),
	uintptr(cInstanceNames),
	uintptr(pInstanceNames),
	uintptr(pInstancePorts),
	uintptr(pcSpn),
	uintptr(prpszSpn),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DsGetSpnW(
  ServiceType: Integer;   // DS_SPN_NAME_TYPE
  ServiceClass: PWideChar;   // LPCWSTR
  ServiceName: PWideChar;   // LPCWSTR optional
  InstancePort: Word;   // WORD
  cInstanceNames: Word;   // WORD
  pInstanceNames: PPWideChar;   // LPCWSTR* optional
  pInstancePorts: Pointer;   // WORD* optional
  pcSpn: Pointer;   // DWORD* out
  prpszSpn: PPWideChar   // LPWSTR** out
): DWORD; stdcall;
  external 'NTDSAPI.dll' name 'DsGetSpnW';

result := DllCall("NTDSAPI\DsGetSpnW"
    , "Int", ServiceType   ; DS_SPN_NAME_TYPE
    , "WStr", ServiceClass   ; LPCWSTR
    , "WStr", ServiceName   ; LPCWSTR optional
    , "UShort", InstancePort   ; WORD
    , "UShort", cInstanceNames   ; WORD
    , "Ptr", pInstanceNames   ; LPCWSTR* optional
    , "Ptr", pInstancePorts   ; WORD* optional
    , "Ptr", pcSpn   ; DWORD* out
    , "Ptr", prpszSpn   ; LPWSTR** out
    , "UInt")   ; return: DWORD

●DsGetSpnW(ServiceType, ServiceClass, ServiceName, InstancePort, cInstanceNames, pInstanceNames, pInstancePorts, pcSpn, prpszSpn) = DLL("NTDSAPI.dll", "dword DsGetSpnW(int, char*, char*, int, int, void*, void*, void*, void*)")
# 呼び出し: DsGetSpnW(ServiceType, ServiceClass, ServiceName, InstancePort, cInstanceNames, pInstanceNames, pInstancePorts, pcSpn, prpszSpn)
# ServiceType : DS_SPN_NAME_TYPE -> "int"
# ServiceClass : LPCWSTR -> "char*"
# ServiceName : LPCWSTR optional -> "char*"
# InstancePort : WORD -> "int"
# cInstanceNames : WORD -> "int"
# pInstanceNames : LPCWSTR* optional -> "void*"
# pInstancePorts : WORD* optional -> "void*"
# pcSpn : DWORD* out -> "void*"
# prpszSpn : LPWSTR** 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。

const std = @import("std");

extern "ntdsapi" fn DsGetSpnW(
    ServiceType: i32, // DS_SPN_NAME_TYPE
    ServiceClass: [*c]const u16, // LPCWSTR
    ServiceName: [*c]const u16, // LPCWSTR optional
    InstancePort: u16, // WORD
    cInstanceNames: u16, // WORD
    pInstanceNames: [*c][*c]u16, // LPCWSTR* optional
    pInstancePorts: [*c]u16, // WORD* optional
    pcSpn: [*c]u32, // DWORD* out
    prpszSpn: [*c][*c][*c]u16 // LPWSTR** out
) callconv(std.os.windows.WINAPI) u32;
// Unicode(-W): UTF-16LE のヌル終端バッファ([*c]const u16)を渡す。

proc DsGetSpnW(
    ServiceType: int32,  # DS_SPN_NAME_TYPE
    ServiceClass: WideCString,  # LPCWSTR
    ServiceName: WideCString,  # LPCWSTR optional
    InstancePort: uint16,  # WORD
    cInstanceNames: uint16,  # WORD
    pInstanceNames: ptr WideCString,  # LPCWSTR* optional
    pInstancePorts: ptr uint16,  # WORD* optional
    pcSpn: ptr uint32,  # DWORD* out
    prpszSpn: ptr WideCString  # LPWSTR** out
): uint32 {.importc: "DsGetSpnW", stdcall, dynlib: "NTDSAPI.dll".}
# Unicode(-W): WideCString は newWideCString("...") で生成。

pragma(lib, "ntdsapi");
extern(Windows)
uint DsGetSpnW(
    int ServiceType,   // DS_SPN_NAME_TYPE
    const(wchar)* ServiceClass,   // LPCWSTR
    const(wchar)* ServiceName,   // LPCWSTR optional
    ushort InstancePort,   // WORD
    ushort cInstanceNames,   // WORD
    wchar** pInstanceNames,   // LPCWSTR* optional
    ushort* pInstancePorts,   // WORD* optional
    uint* pcSpn,   // DWORD* out
    wchar*** prpszSpn   // LPWSTR** out
);

ccall((:DsGetSpnW, "NTDSAPI.dll"), stdcall, UInt32,
      (Int32, Cwstring, Cwstring, UInt16, UInt16, Ptr{Ptr{UInt16}}, Ptr{UInt16}, Ptr{UInt32}, Ptr{Ptr{UInt16}}),
      ServiceType, ServiceClass, ServiceName, InstancePort, cInstanceNames, pInstanceNames, pInstancePorts, pcSpn, prpszSpn)
# ServiceType : DS_SPN_NAME_TYPE -> Int32
# ServiceClass : LPCWSTR -> Cwstring
# ServiceName : LPCWSTR optional -> Cwstring
# InstancePort : WORD -> UInt16
# cInstanceNames : WORD -> UInt16
# pInstanceNames : LPCWSTR* optional -> Ptr{Ptr{UInt16}}
# pInstancePorts : WORD* optional -> Ptr{UInt16}
# pcSpn : DWORD* out -> Ptr{UInt32}
# prpszSpn : LPWSTR** out -> Ptr{Ptr{UInt16}}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
# Unicode(-W): Cwstring には transcode(UInt16, "...") 等で UTF-16 を渡す。

local ffi = require("ffi")
ffi.cdef[[
uint32_t DsGetSpnW(
    int32_t ServiceType,
    const uint16_t* ServiceClass,
    const uint16_t* ServiceName,
    uint16_t InstancePort,
    uint16_t cInstanceNames,
    uint16_t** pInstanceNames,
    uint16_t* pInstancePorts,
    uint32_t* pcSpn,
    uint16_t*** prpszSpn);
]]
local ntdsapi = ffi.load("ntdsapi")
-- ntdsapi.DsGetSpnW(ServiceType, ServiceClass, ServiceName, InstancePort, cInstanceNames, pInstanceNames, pInstancePorts, pcSpn, prpszSpn)
-- ServiceType : DS_SPN_NAME_TYPE
-- ServiceClass : LPCWSTR
-- ServiceName : LPCWSTR optional
-- InstancePort : WORD
-- cInstanceNames : WORD
-- pInstanceNames : LPCWSTR* optional
-- pInstancePorts : WORD* optional
-- pcSpn : DWORD* out
-- prpszSpn : LPWSTR** 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。
-- Unicode(-W): uint16_t* には UTF-16LE のバッファ(ffi.new("uint16_t[?]", ...))を渡す。

const koffi = require('koffi');
const lib = koffi.load('NTDSAPI.dll');
const DsGetSpnW = lib.func('__stdcall', 'DsGetSpnW', 'uint32_t', ['int32_t', 'str16', 'str16', 'uint16_t', 'uint16_t', 'void *', 'uint16_t *', 'uint32_t *', 'void *']);
// DsGetSpnW(ServiceType, ServiceClass, ServiceName, InstancePort, cInstanceNames, pInstanceNames, pInstancePorts, pcSpn, prpszSpn)
// ServiceType : DS_SPN_NAME_TYPE -> 'int32_t'
// ServiceClass : LPCWSTR -> 'str16'
// ServiceName : LPCWSTR optional -> 'str16'
// InstancePort : WORD -> 'uint16_t'
// cInstanceNames : WORD -> 'uint16_t'
// pInstanceNames : LPCWSTR* optional -> 'void *'
// pInstancePorts : WORD* optional -> 'uint16_t *'
// pcSpn : DWORD* out -> 'uint32_t *'
// prpszSpn : LPWSTR** 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("NTDSAPI.dll", {
  DsGetSpnW: { parameters: ["i32", "buffer", "buffer", "u16", "u16", "pointer", "pointer", "pointer", "pointer"], result: "u32" },
});
// lib.symbols.DsGetSpnW(ServiceType, ServiceClass, ServiceName, InstancePort, cInstanceNames, pInstanceNames, pInstancePorts, pcSpn, prpszSpn)
// ServiceType : DS_SPN_NAME_TYPE -> "i32"
// ServiceClass : LPCWSTR -> "buffer"
// ServiceName : LPCWSTR optional -> "buffer"
// InstancePort : WORD -> "u16"
// cInstanceNames : WORD -> "u16"
// pInstanceNames : LPCWSTR* optional -> "pointer"
// pInstancePorts : WORD* optional -> "pointer"
// pcSpn : DWORD* out -> "pointer"
// prpszSpn : LPWSTR** out -> "pointer"
// 文字列は "buffer"。Unicode(-W) は new TextEncoder() ではなく UTF-16LE のバイト列(末尾に \x00\x00)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 DsGetSpnW(
    int32_t ServiceType,
    const uint16_t* ServiceClass,
    const uint16_t* ServiceName,
    uint16_t InstancePort,
    uint16_t cInstanceNames,
    uint16_t** pInstanceNames,
    uint16_t* pInstancePorts,
    uint32_t* pcSpn,
    uint16_t*** prpszSpn);
C, "NTDSAPI.dll");
// $ffi->DsGetSpnW(ServiceType, ServiceClass, ServiceName, InstancePort, cInstanceNames, pInstanceNames, pInstancePorts, pcSpn, prpszSpn);
// ServiceType : DS_SPN_NAME_TYPE
// ServiceClass : LPCWSTR
// ServiceName : LPCWSTR optional
// InstancePort : WORD
// cInstanceNames : WORD
// pInstanceNames : LPCWSTR* optional
// pInstancePorts : WORD* optional
// pcSpn : DWORD* out
// prpszSpn : LPWSTR** 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 Ntdsapi extends StdCallLibrary {
    Ntdsapi INSTANCE = Native.load("ntdsapi", Ntdsapi.class, W32APIOptions.UNICODE_OPTIONS);
    int DsGetSpnW(
        int ServiceType,   // DS_SPN_NAME_TYPE
        WString ServiceClass,   // LPCWSTR
        WString ServiceName,   // LPCWSTR optional
        short InstancePort,   // WORD
        short cInstanceNames,   // WORD
        PointerByReference pInstanceNames,   // LPCWSTR* optional
        ShortByReference pInstancePorts,   // WORD* optional
        IntByReference pcSpn,   // DWORD* out
        PointerByReference prpszSpn   // LPWSTR** out
    );
}
// Unicode(-W): WString(入力)/char[](出力)で UTF-16 をマーシャリング。

@[Link("ntdsapi")]
lib LibNTDSAPI
  fun DsGetSpnW = DsGetSpnW(
    ServiceType : Int32,   # DS_SPN_NAME_TYPE
    ServiceClass : UInt16*,   # LPCWSTR
    ServiceName : UInt16*,   # LPCWSTR optional
    InstancePort : UInt16,   # WORD
    cInstanceNames : UInt16,   # WORD
    pInstanceNames : UInt16**,   # LPCWSTR* optional
    pInstancePorts : UInt16*,   # WORD* optional
    pcSpn : UInt32*,   # DWORD* out
    prpszSpn : UInt16***   # LPWSTR** 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 DsGetSpnWNative = Uint32 Function(Int32, Pointer<Utf16>, Pointer<Utf16>, Uint16, Uint16, Pointer<Pointer<Utf16>>, Pointer<Uint16>, Pointer<Uint32>, Pointer<Pointer<Utf16>>);
typedef DsGetSpnWDart = int Function(int, Pointer<Utf16>, Pointer<Utf16>, int, int, Pointer<Pointer<Utf16>>, Pointer<Uint16>, Pointer<Uint32>, Pointer<Pointer<Utf16>>);
final DsGetSpnW = DynamicLibrary.open('NTDSAPI.dll')
    .lookupFunction<DsGetSpnWNative, DsGetSpnWDart>('DsGetSpnW');
// ServiceType : DS_SPN_NAME_TYPE -> Int32
// ServiceClass : LPCWSTR -> Pointer<Utf16>
// ServiceName : LPCWSTR optional -> Pointer<Utf16>
// InstancePort : WORD -> Uint16
// cInstanceNames : WORD -> Uint16
// pInstanceNames : LPCWSTR* optional -> Pointer<Pointer<Utf16>>
// pInstancePorts : WORD* optional -> Pointer<Uint16>
// pcSpn : DWORD* out -> Pointer<Uint32>
// prpszSpn : LPWSTR** out -> Pointer<Pointer<Utf16>>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DsGetSpnW(
  ServiceType: Integer;   // DS_SPN_NAME_TYPE
  ServiceClass: PWideChar;   // LPCWSTR
  ServiceName: PWideChar;   // LPCWSTR optional
  InstancePort: Word;   // WORD
  cInstanceNames: Word;   // WORD
  pInstanceNames: PPWideChar;   // LPCWSTR* optional
  pInstancePorts: Pointer;   // WORD* optional
  pcSpn: Pointer;   // DWORD* out
  prpszSpn: PPWideChar   // LPWSTR** out
): DWORD; stdcall;
  external 'NTDSAPI.dll' name 'DsGetSpnW';

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

foreign import stdcall safe "DsGetSpnW"
  c_DsGetSpnW :: Int32 -> CWString -> CWString -> Word16 -> Word16 -> Ptr CWString -> Ptr Word16 -> Ptr Word32 -> Ptr CWString -> IO Word32
-- ServiceType : DS_SPN_NAME_TYPE -> Int32
-- ServiceClass : LPCWSTR -> CWString
-- ServiceName : LPCWSTR optional -> CWString
-- InstancePort : WORD -> Word16
-- cInstanceNames : WORD -> Word16
-- pInstanceNames : LPCWSTR* optional -> Ptr CWString
-- pInstancePorts : WORD* optional -> Ptr Word16
-- pcSpn : DWORD* out -> Ptr Word32
-- prpszSpn : LPWSTR** out -> Ptr CWString
-- 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 dsgetspnw =
  foreign "DsGetSpnW"
    (int32_t @-> (ptr uint16_t) @-> (ptr uint16_t) @-> uint16_t @-> uint16_t @-> (ptr (ptr uint16_t)) @-> (ptr uint16_t) @-> (ptr uint32_t) @-> (ptr (ptr uint16_t)) @-> returning uint32_t)
(* ServiceType : DS_SPN_NAME_TYPE -> int32_t *)
(* ServiceClass : LPCWSTR -> (ptr uint16_t) *)
(* ServiceName : LPCWSTR optional -> (ptr uint16_t) *)
(* InstancePort : WORD -> uint16_t *)
(* cInstanceNames : WORD -> uint16_t *)
(* pInstanceNames : LPCWSTR* optional -> (ptr (ptr uint16_t)) *)
(* pInstancePorts : WORD* optional -> (ptr uint16_t) *)
(* pcSpn : DWORD* out -> (ptr uint32_t) *)
(* prpszSpn : LPWSTR** out -> (ptr (ptr uint16_t)) *)
(* 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 ntdsapi (t "NTDSAPI.dll"))
(cffi:use-foreign-library ntdsapi)

(cffi:defcfun ("DsGetSpnW" ds-get-spn-w :convention :stdcall) :uint32
  (service-type :int32)   ; DS_SPN_NAME_TYPE
  (service-class (:string :encoding :utf-16le))   ; LPCWSTR
  (service-name (:string :encoding :utf-16le))   ; LPCWSTR optional
  (instance-port :uint16)   ; WORD
  (c-instance-names :uint16)   ; WORD
  (p-instance-names :pointer)   ; LPCWSTR* optional
  (p-instance-ports :pointer)   ; WORD* optional
  (pc-spn :pointer)   ; DWORD* out
  (prpsz-spn :pointer))   ; LPWSTR** out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $DsGetSpnW = Win32::API::More->new('NTDSAPI',
    'DWORD DsGetSpnW(int ServiceType, LPCWSTR ServiceClass, LPCWSTR ServiceName, WORD InstancePort, WORD cInstanceNames, LPVOID pInstanceNames, LPVOID pInstancePorts, LPVOID pcSpn, LPVOID prpszSpn)');
# my $ret = $DsGetSpnW->Call($ServiceType, $ServiceClass, $ServiceName, $InstancePort, $cInstanceNames, $pInstanceNames, $pInstancePorts, $pcSpn, $prpszSpn);
# ServiceType : DS_SPN_NAME_TYPE -> int
# ServiceClass : LPCWSTR -> LPCWSTR
# ServiceName : LPCWSTR optional -> LPCWSTR
# InstancePort : WORD -> WORD
# cInstanceNames : WORD -> WORD
# pInstanceNames : LPCWSTR* optional -> LPVOID
# pInstancePorts : WORD* optional -> LPVOID
# pcSpn : DWORD* out -> LPVOID
# prpszSpn : LPWSTR** out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。
# Unicode(-W): LPCWSTR/LPWSTR は Win32::API が UTF-16 変換を行う。