CredUnPackAuthenticationBufferW

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

BOOL CredUnPackAuthenticationBufferW(
    CRED_PACK_FLAGS dwFlags,
    void* pAuthBuffer,
    DWORD cbAuthBuffer,
    LPWSTR pszUserName,   // optional
    DWORD* pcchMaxUserName,
    LPWSTR pszDomainName,   // optional
    DWORD* pcchMaxDomainName,   // optional
    LPWSTR pszPassword,   // optional
    DWORD* pcchMaxPassword
);

<DllImport("credui.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CredUnPackAuthenticationBufferW(
    dwFlags As UInteger,   ' CRED_PACK_FLAGS
    pAuthBuffer As IntPtr,   ' void*
    cbAuthBuffer As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> pszUserName As System.Text.StringBuilder,   ' LPWSTR optional, out
    ByRef pcchMaxUserName As UInteger,   ' DWORD* in/out
    <MarshalAs(UnmanagedType.LPWStr)> pszDomainName As System.Text.StringBuilder,   ' LPWSTR optional, out
    pcchMaxDomainName As IntPtr,   ' DWORD* optional, in/out
    <MarshalAs(UnmanagedType.LPWStr)> pszPassword As System.Text.StringBuilder,   ' LPWSTR optional, out
    ByRef pcchMaxPassword As UInteger   ' DWORD* in/out
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' dwFlags : CRED_PACK_FLAGS
' pAuthBuffer : void*
' cbAuthBuffer : DWORD
' pszUserName : LPWSTR optional, out
' pcchMaxUserName : DWORD* in/out
' pszDomainName : LPWSTR optional, out
' pcchMaxDomainName : DWORD* optional, in/out
' pszPassword : LPWSTR optional, out
' pcchMaxPassword : DWORD* in/out
Declare PtrSafe Function CredUnPackAuthenticationBufferW Lib "credui" ( _
    ByVal dwFlags As Long, _
    ByVal pAuthBuffer As LongPtr, _
    ByVal cbAuthBuffer As Long, _
    ByVal pszUserName As LongPtr, _
    ByRef pcchMaxUserName As Long, _
    ByVal pszDomainName As LongPtr, _
    ByVal pcchMaxDomainName As LongPtr, _
    ByVal pszPassword As LongPtr, _
    ByRef pcchMaxPassword As Long) 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

CredUnPackAuthenticationBufferW = ctypes.windll.credui.CredUnPackAuthenticationBufferW
CredUnPackAuthenticationBufferW.restype = wintypes.BOOL
CredUnPackAuthenticationBufferW.argtypes = [
    wintypes.DWORD,  # dwFlags : CRED_PACK_FLAGS
    ctypes.POINTER(None),  # pAuthBuffer : void*
    wintypes.DWORD,  # cbAuthBuffer : DWORD
    wintypes.LPWSTR,  # pszUserName : LPWSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchMaxUserName : DWORD* in/out
    wintypes.LPWSTR,  # pszDomainName : LPWSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchMaxDomainName : DWORD* optional, in/out
    wintypes.LPWSTR,  # pszPassword : LPWSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchMaxPassword : DWORD* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('credui.dll')
CredUnPackAuthenticationBufferW = Fiddle::Function.new(
  lib['CredUnPackAuthenticationBufferW'],
  [
    -Fiddle::TYPE_INT,  # dwFlags : CRED_PACK_FLAGS
    Fiddle::TYPE_VOIDP,  # pAuthBuffer : void*
    -Fiddle::TYPE_INT,  # cbAuthBuffer : DWORD
    Fiddle::TYPE_VOIDP,  # pszUserName : LPWSTR optional, out
    Fiddle::TYPE_VOIDP,  # pcchMaxUserName : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # pszDomainName : LPWSTR optional, out
    Fiddle::TYPE_VOIDP,  # pcchMaxDomainName : DWORD* optional, in/out
    Fiddle::TYPE_VOIDP,  # pszPassword : LPWSTR optional, out
    Fiddle::TYPE_VOIDP,  # pcchMaxPassword : DWORD* in/out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "credui")]
extern "system" {
    fn CredUnPackAuthenticationBufferW(
        dwFlags: u32,  // CRED_PACK_FLAGS
        pAuthBuffer: *mut (),  // void*
        cbAuthBuffer: u32,  // DWORD
        pszUserName: *mut u16,  // LPWSTR optional, out
        pcchMaxUserName: *mut u32,  // DWORD* in/out
        pszDomainName: *mut u16,  // LPWSTR optional, out
        pcchMaxDomainName: *mut u32,  // DWORD* optional, in/out
        pszPassword: *mut u16,  // LPWSTR optional, out
        pcchMaxPassword: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("credui.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool CredUnPackAuthenticationBufferW(uint dwFlags, IntPtr pAuthBuffer, uint cbAuthBuffer, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszUserName, ref uint pcchMaxUserName, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszDomainName, IntPtr pcchMaxDomainName, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszPassword, ref uint pcchMaxPassword);
"@
$api = Add-Type -MemberDefinition $sig -Name 'credui_CredUnPackAuthenticationBufferW' -Namespace Win32 -PassThru
# $api::CredUnPackAuthenticationBufferW(dwFlags, pAuthBuffer, cbAuthBuffer, pszUserName, pcchMaxUserName, pszDomainName, pcchMaxDomainName, pszPassword, pcchMaxPassword)

#uselib "credui.dll"
#func global CredUnPackAuthenticationBufferW "CredUnPackAuthenticationBufferW" wptr, wptr, wptr, wptr, wptr, wptr, wptr, wptr, wptr
; CredUnPackAuthenticationBufferW dwFlags, pAuthBuffer, cbAuthBuffer, varptr(pszUserName), varptr(pcchMaxUserName), varptr(pszDomainName), varptr(pcchMaxDomainName), varptr(pszPassword), varptr(pcchMaxPassword)   ; 戻り値は stat
; dwFlags : CRED_PACK_FLAGS -> "wptr"
; pAuthBuffer : void* -> "wptr"
; cbAuthBuffer : DWORD -> "wptr"
; pszUserName : LPWSTR optional, out -> "wptr"
; pcchMaxUserName : DWORD* in/out -> "wptr"
; pszDomainName : LPWSTR optional, out -> "wptr"
; pcchMaxDomainName : DWORD* optional, in/out -> "wptr"
; pszPassword : LPWSTR optional, out -> "wptr"
; pcchMaxPassword : DWORD* in/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 (
	credui = windows.NewLazySystemDLL("credui.dll")
	procCredUnPackAuthenticationBufferW = credui.NewProc("CredUnPackAuthenticationBufferW")
)

// dwFlags (CRED_PACK_FLAGS), pAuthBuffer (void*), cbAuthBuffer (DWORD), pszUserName (LPWSTR optional, out), pcchMaxUserName (DWORD* in/out), pszDomainName (LPWSTR optional, out), pcchMaxDomainName (DWORD* optional, in/out), pszPassword (LPWSTR optional, out), pcchMaxPassword (DWORD* in/out)
r1, _, err := procCredUnPackAuthenticationBufferW.Call(
	uintptr(dwFlags),
	uintptr(pAuthBuffer),
	uintptr(cbAuthBuffer),
	uintptr(pszUserName),
	uintptr(pcchMaxUserName),
	uintptr(pszDomainName),
	uintptr(pcchMaxDomainName),
	uintptr(pszPassword),
	uintptr(pcchMaxPassword),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CredUnPackAuthenticationBufferW(
  dwFlags: DWORD;   // CRED_PACK_FLAGS
  pAuthBuffer: Pointer;   // void*
  cbAuthBuffer: DWORD;   // DWORD
  pszUserName: PWideChar;   // LPWSTR optional, out
  pcchMaxUserName: Pointer;   // DWORD* in/out
  pszDomainName: PWideChar;   // LPWSTR optional, out
  pcchMaxDomainName: Pointer;   // DWORD* optional, in/out
  pszPassword: PWideChar;   // LPWSTR optional, out
  pcchMaxPassword: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'credui.dll' name 'CredUnPackAuthenticationBufferW';

result := DllCall("credui\CredUnPackAuthenticationBufferW"
    , "UInt", dwFlags   ; CRED_PACK_FLAGS
    , "Ptr", pAuthBuffer   ; void*
    , "UInt", cbAuthBuffer   ; DWORD
    , "Ptr", pszUserName   ; LPWSTR optional, out
    , "Ptr", pcchMaxUserName   ; DWORD* in/out
    , "Ptr", pszDomainName   ; LPWSTR optional, out
    , "Ptr", pcchMaxDomainName   ; DWORD* optional, in/out
    , "Ptr", pszPassword   ; LPWSTR optional, out
    , "Ptr", pcchMaxPassword   ; DWORD* in/out
    , "Int")   ; return: BOOL

●CredUnPackAuthenticationBufferW(dwFlags, pAuthBuffer, cbAuthBuffer, pszUserName, pcchMaxUserName, pszDomainName, pcchMaxDomainName, pszPassword, pcchMaxPassword) = DLL("credui.dll", "bool CredUnPackAuthenticationBufferW(dword, void*, dword, char*, void*, char*, void*, char*, void*)")
# 呼び出し: CredUnPackAuthenticationBufferW(dwFlags, pAuthBuffer, cbAuthBuffer, pszUserName, pcchMaxUserName, pszDomainName, pcchMaxDomainName, pszPassword, pcchMaxPassword)
# dwFlags : CRED_PACK_FLAGS -> "dword"
# pAuthBuffer : void* -> "void*"
# cbAuthBuffer : DWORD -> "dword"
# pszUserName : LPWSTR optional, out -> "char*"
# pcchMaxUserName : DWORD* in/out -> "void*"
# pszDomainName : LPWSTR optional, out -> "char*"
# pcchMaxDomainName : DWORD* optional, in/out -> "void*"
# pszPassword : LPWSTR optional, out -> "char*"
# pcchMaxPassword : DWORD* 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)。
# ※-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 "credui" fn CredUnPackAuthenticationBufferW(
    dwFlags: u32, // CRED_PACK_FLAGS
    pAuthBuffer: ?*anyopaque, // void*
    cbAuthBuffer: u32, // DWORD
    pszUserName: [*c]u16, // LPWSTR optional, out
    pcchMaxUserName: [*c]u32, // DWORD* in/out
    pszDomainName: [*c]u16, // LPWSTR optional, out
    pcchMaxDomainName: [*c]u32, // DWORD* optional, in/out
    pszPassword: [*c]u16, // LPWSTR optional, out
    pcchMaxPassword: [*c]u32 // DWORD* in/out
) callconv(std.os.windows.WINAPI) i32;
// Unicode(-W): UTF-16LE のヌル終端バッファ([*c]const u16)を渡す。

proc CredUnPackAuthenticationBufferW(
    dwFlags: uint32,  # CRED_PACK_FLAGS
    pAuthBuffer: pointer,  # void*
    cbAuthBuffer: uint32,  # DWORD
    pszUserName: ptr uint16,  # LPWSTR optional, out
    pcchMaxUserName: ptr uint32,  # DWORD* in/out
    pszDomainName: ptr uint16,  # LPWSTR optional, out
    pcchMaxDomainName: ptr uint32,  # DWORD* optional, in/out
    pszPassword: ptr uint16,  # LPWSTR optional, out
    pcchMaxPassword: ptr uint32  # DWORD* in/out
): int32 {.importc: "CredUnPackAuthenticationBufferW", stdcall, dynlib: "credui.dll".}
# Unicode(-W): WideCString は newWideCString("...") で生成。

pragma(lib, "credui");
extern(Windows)
int CredUnPackAuthenticationBufferW(
    uint dwFlags,   // CRED_PACK_FLAGS
    void* pAuthBuffer,   // void*
    uint cbAuthBuffer,   // DWORD
    wchar* pszUserName,   // LPWSTR optional, out
    uint* pcchMaxUserName,   // DWORD* in/out
    wchar* pszDomainName,   // LPWSTR optional, out
    uint* pcchMaxDomainName,   // DWORD* optional, in/out
    wchar* pszPassword,   // LPWSTR optional, out
    uint* pcchMaxPassword   // DWORD* in/out
);

ccall((:CredUnPackAuthenticationBufferW, "credui.dll"), stdcall, Int32,
      (UInt32, Ptr{Cvoid}, UInt32, Ptr{UInt16}, Ptr{UInt32}, Ptr{UInt16}, Ptr{UInt32}, Ptr{UInt16}, Ptr{UInt32}),
      dwFlags, pAuthBuffer, cbAuthBuffer, pszUserName, pcchMaxUserName, pszDomainName, pcchMaxDomainName, pszPassword, pcchMaxPassword)
# dwFlags : CRED_PACK_FLAGS -> UInt32
# pAuthBuffer : void* -> Ptr{Cvoid}
# cbAuthBuffer : DWORD -> UInt32
# pszUserName : LPWSTR optional, out -> Ptr{UInt16}
# pcchMaxUserName : DWORD* in/out -> Ptr{UInt32}
# pszDomainName : LPWSTR optional, out -> Ptr{UInt16}
# pcchMaxDomainName : DWORD* optional, in/out -> Ptr{UInt32}
# pszPassword : LPWSTR optional, out -> Ptr{UInt16}
# pcchMaxPassword : DWORD* in/out -> Ptr{UInt32}
# 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[[
int32_t CredUnPackAuthenticationBufferW(
    uint32_t dwFlags,
    void* pAuthBuffer,
    uint32_t cbAuthBuffer,
    uint16_t* pszUserName,
    uint32_t* pcchMaxUserName,
    uint16_t* pszDomainName,
    uint32_t* pcchMaxDomainName,
    uint16_t* pszPassword,
    uint32_t* pcchMaxPassword);
]]
local credui = ffi.load("credui")
-- credui.CredUnPackAuthenticationBufferW(dwFlags, pAuthBuffer, cbAuthBuffer, pszUserName, pcchMaxUserName, pszDomainName, pcchMaxDomainName, pszPassword, pcchMaxPassword)
-- dwFlags : CRED_PACK_FLAGS
-- pAuthBuffer : void*
-- cbAuthBuffer : DWORD
-- pszUserName : LPWSTR optional, out
-- pcchMaxUserName : DWORD* in/out
-- pszDomainName : LPWSTR optional, out
-- pcchMaxDomainName : DWORD* optional, in/out
-- pszPassword : LPWSTR optional, out
-- pcchMaxPassword : DWORD* 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。
-- 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('credui.dll');
const CredUnPackAuthenticationBufferW = lib.func('__stdcall', 'CredUnPackAuthenticationBufferW', 'int32_t', ['uint32_t', 'void *', 'uint32_t', 'uint16_t *', 'uint32_t *', 'uint16_t *', 'uint32_t *', 'uint16_t *', 'uint32_t *']);
// CredUnPackAuthenticationBufferW(dwFlags, pAuthBuffer, cbAuthBuffer, pszUserName, pcchMaxUserName, pszDomainName, pcchMaxDomainName, pszPassword, pcchMaxPassword)
// dwFlags : CRED_PACK_FLAGS -> 'uint32_t'
// pAuthBuffer : void* -> 'void *'
// cbAuthBuffer : DWORD -> 'uint32_t'
// pszUserName : LPWSTR optional, out -> 'uint16_t *'
// pcchMaxUserName : DWORD* in/out -> 'uint32_t *'
// pszDomainName : LPWSTR optional, out -> 'uint16_t *'
// pcchMaxDomainName : DWORD* optional, in/out -> 'uint32_t *'
// pszPassword : LPWSTR optional, out -> 'uint16_t *'
// pcchMaxPassword : DWORD* in/out -> 'uint32_t *'
// 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("credui.dll", {
  CredUnPackAuthenticationBufferW: { parameters: ["u32", "pointer", "u32", "buffer", "pointer", "buffer", "pointer", "buffer", "pointer"], result: "i32" },
});
// lib.symbols.CredUnPackAuthenticationBufferW(dwFlags, pAuthBuffer, cbAuthBuffer, pszUserName, pcchMaxUserName, pszDomainName, pcchMaxDomainName, pszPassword, pcchMaxPassword)
// dwFlags : CRED_PACK_FLAGS -> "u32"
// pAuthBuffer : void* -> "pointer"
// cbAuthBuffer : DWORD -> "u32"
// pszUserName : LPWSTR optional, out -> "buffer"
// pcchMaxUserName : DWORD* in/out -> "pointer"
// pszDomainName : LPWSTR optional, out -> "buffer"
// pcchMaxDomainName : DWORD* optional, in/out -> "pointer"
// pszPassword : LPWSTR optional, out -> "buffer"
// pcchMaxPassword : DWORD* in/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
int32_t CredUnPackAuthenticationBufferW(
    uint32_t dwFlags,
    void* pAuthBuffer,
    uint32_t cbAuthBuffer,
    uint16_t* pszUserName,
    uint32_t* pcchMaxUserName,
    uint16_t* pszDomainName,
    uint32_t* pcchMaxDomainName,
    uint16_t* pszPassword,
    uint32_t* pcchMaxPassword);
C, "credui.dll");
// $ffi->CredUnPackAuthenticationBufferW(dwFlags, pAuthBuffer, cbAuthBuffer, pszUserName, pcchMaxUserName, pszDomainName, pcchMaxDomainName, pszPassword, pcchMaxPassword);
// dwFlags : CRED_PACK_FLAGS
// pAuthBuffer : void*
// cbAuthBuffer : DWORD
// pszUserName : LPWSTR optional, out
// pcchMaxUserName : DWORD* in/out
// pszDomainName : LPWSTR optional, out
// pcchMaxDomainName : DWORD* optional, in/out
// pszPassword : LPWSTR optional, out
// pcchMaxPassword : DWORD* 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 Credui extends StdCallLibrary {
    Credui INSTANCE = Native.load("credui", Credui.class, W32APIOptions.UNICODE_OPTIONS);
    boolean CredUnPackAuthenticationBufferW(
        int dwFlags,   // CRED_PACK_FLAGS
        Pointer pAuthBuffer,   // void*
        int cbAuthBuffer,   // DWORD
        char[] pszUserName,   // LPWSTR optional, out
        IntByReference pcchMaxUserName,   // DWORD* in/out
        char[] pszDomainName,   // LPWSTR optional, out
        IntByReference pcchMaxDomainName,   // DWORD* optional, in/out
        char[] pszPassword,   // LPWSTR optional, out
        IntByReference pcchMaxPassword   // DWORD* in/out
    );
}
// Unicode(-W): WString(入力)/char[](出力)で UTF-16 をマーシャリング。

@[Link("credui")]
lib Libcredui
  fun CredUnPackAuthenticationBufferW = CredUnPackAuthenticationBufferW(
    dwFlags : UInt32,   # CRED_PACK_FLAGS
    pAuthBuffer : Void*,   # void*
    cbAuthBuffer : UInt32,   # DWORD
    pszUserName : UInt16*,   # LPWSTR optional, out
    pcchMaxUserName : UInt32*,   # DWORD* in/out
    pszDomainName : UInt16*,   # LPWSTR optional, out
    pcchMaxDomainName : UInt32*,   # DWORD* optional, in/out
    pszPassword : UInt16*,   # LPWSTR optional, out
    pcchMaxPassword : UInt32*   # DWORD* in/out
  ) : Int32
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 CredUnPackAuthenticationBufferWNative = Int32 Function(Uint32, Pointer<Void>, Uint32, Pointer<Utf16>, Pointer<Uint32>, Pointer<Utf16>, Pointer<Uint32>, Pointer<Utf16>, Pointer<Uint32>);
typedef CredUnPackAuthenticationBufferWDart = int Function(int, Pointer<Void>, int, Pointer<Utf16>, Pointer<Uint32>, Pointer<Utf16>, Pointer<Uint32>, Pointer<Utf16>, Pointer<Uint32>);
final CredUnPackAuthenticationBufferW = DynamicLibrary.open('credui.dll')
    .lookupFunction<CredUnPackAuthenticationBufferWNative, CredUnPackAuthenticationBufferWDart>('CredUnPackAuthenticationBufferW');
// dwFlags : CRED_PACK_FLAGS -> Uint32
// pAuthBuffer : void* -> Pointer<Void>
// cbAuthBuffer : DWORD -> Uint32
// pszUserName : LPWSTR optional, out -> Pointer<Utf16>
// pcchMaxUserName : DWORD* in/out -> Pointer<Uint32>
// pszDomainName : LPWSTR optional, out -> Pointer<Utf16>
// pcchMaxDomainName : DWORD* optional, in/out -> Pointer<Uint32>
// pszPassword : LPWSTR optional, out -> Pointer<Utf16>
// pcchMaxPassword : DWORD* in/out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function CredUnPackAuthenticationBufferW(
  dwFlags: DWORD;   // CRED_PACK_FLAGS
  pAuthBuffer: Pointer;   // void*
  cbAuthBuffer: DWORD;   // DWORD
  pszUserName: PWideChar;   // LPWSTR optional, out
  pcchMaxUserName: Pointer;   // DWORD* in/out
  pszDomainName: PWideChar;   // LPWSTR optional, out
  pcchMaxDomainName: Pointer;   // DWORD* optional, in/out
  pszPassword: PWideChar;   // LPWSTR optional, out
  pcchMaxPassword: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'credui.dll' name 'CredUnPackAuthenticationBufferW';

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

foreign import stdcall safe "CredUnPackAuthenticationBufferW"
  c_CredUnPackAuthenticationBufferW :: Word32 -> Ptr () -> Word32 -> CWString -> Ptr Word32 -> CWString -> Ptr Word32 -> CWString -> Ptr Word32 -> IO CInt
-- dwFlags : CRED_PACK_FLAGS -> Word32
-- pAuthBuffer : void* -> Ptr ()
-- cbAuthBuffer : DWORD -> Word32
-- pszUserName : LPWSTR optional, out -> CWString
-- pcchMaxUserName : DWORD* in/out -> Ptr Word32
-- pszDomainName : LPWSTR optional, out -> CWString
-- pcchMaxDomainName : DWORD* optional, in/out -> Ptr Word32
-- pszPassword : LPWSTR optional, out -> CWString
-- pcchMaxPassword : DWORD* in/out -> Ptr Word32
-- 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 credunpackauthenticationbufferw =
  foreign "CredUnPackAuthenticationBufferW"
    (uint32_t @-> (ptr void) @-> uint32_t @-> (ptr uint16_t) @-> (ptr uint32_t) @-> (ptr uint16_t) @-> (ptr uint32_t) @-> (ptr uint16_t) @-> (ptr uint32_t) @-> returning int32_t)
(* dwFlags : CRED_PACK_FLAGS -> uint32_t *)
(* pAuthBuffer : void* -> (ptr void) *)
(* cbAuthBuffer : DWORD -> uint32_t *)
(* pszUserName : LPWSTR optional, out -> (ptr uint16_t) *)
(* pcchMaxUserName : DWORD* in/out -> (ptr uint32_t) *)
(* pszDomainName : LPWSTR optional, out -> (ptr uint16_t) *)
(* pcchMaxDomainName : DWORD* optional, in/out -> (ptr uint32_t) *)
(* pszPassword : LPWSTR optional, out -> (ptr uint16_t) *)
(* pcchMaxPassword : DWORD* in/out -> (ptr uint32_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 credui (t "credui.dll"))
(cffi:use-foreign-library credui)

(cffi:defcfun ("CredUnPackAuthenticationBufferW" cred-un-pack-authentication-buffer-w :convention :stdcall) :int32
  (dw-flags :uint32)   ; CRED_PACK_FLAGS
  (p-auth-buffer :pointer)   ; void*
  (cb-auth-buffer :uint32)   ; DWORD
  (psz-user-name :pointer)   ; LPWSTR optional, out
  (pcch-max-user-name :pointer)   ; DWORD* in/out
  (psz-domain-name :pointer)   ; LPWSTR optional, out
  (pcch-max-domain-name :pointer)   ; DWORD* optional, in/out
  (psz-password :pointer)   ; LPWSTR optional, out
  (pcch-max-password :pointer))   ; DWORD* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $CredUnPackAuthenticationBufferW = Win32::API::More->new('credui',
    'BOOL CredUnPackAuthenticationBufferW(DWORD dwFlags, LPVOID pAuthBuffer, DWORD cbAuthBuffer, LPWSTR pszUserName, LPVOID pcchMaxUserName, LPWSTR pszDomainName, LPVOID pcchMaxDomainName, LPWSTR pszPassword, LPVOID pcchMaxPassword)');
# my $ret = $CredUnPackAuthenticationBufferW->Call($dwFlags, $pAuthBuffer, $cbAuthBuffer, $pszUserName, $pcchMaxUserName, $pszDomainName, $pcchMaxDomainName, $pszPassword, $pcchMaxPassword);
# dwFlags : CRED_PACK_FLAGS -> DWORD
# pAuthBuffer : void* -> LPVOID
# cbAuthBuffer : DWORD -> DWORD
# pszUserName : LPWSTR optional, out -> LPWSTR
# pcchMaxUserName : DWORD* in/out -> LPVOID
# pszDomainName : LPWSTR optional, out -> LPWSTR
# pcchMaxDomainName : DWORD* optional, in/out -> LPVOID
# pszPassword : LPWSTR optional, out -> LPWSTR
# pcchMaxPassword : DWORD* 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。
# Unicode(-W): LPCWSTR/LPWSTR は Win32::API が UTF-16 変換を行う。