CredEnumerateW

// ADVAPI32.dll  (Unicode / -W)
#include <windows.h>

BOOL CredEnumerateW(
    LPCWSTR Filter,   // optional
    CRED_ENUMERATE_FLAGS Flags,   // optional
    DWORD* Count,
    CREDENTIALW*** Credential
);

<DllImport("ADVAPI32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CredEnumerateW(
    <MarshalAs(UnmanagedType.LPWStr)> Filter As String,   ' LPCWSTR optional
    Flags As UInteger,   ' CRED_ENUMERATE_FLAGS optional
    <Out> ByRef Count As UInteger,   ' DWORD* out
    Credential As IntPtr   ' CREDENTIALW*** out
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' Filter : LPCWSTR optional
' Flags : CRED_ENUMERATE_FLAGS optional
' Count : DWORD* out
' Credential : CREDENTIALW*** out
Declare PtrSafe Function CredEnumerateW Lib "advapi32" ( _
    ByVal Filter As LongPtr, _
    ByVal Flags As Long, _
    ByRef Count As Long, _
    ByVal Credential 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

CredEnumerateW = ctypes.windll.advapi32.CredEnumerateW
CredEnumerateW.restype = wintypes.BOOL
CredEnumerateW.argtypes = [
    wintypes.LPCWSTR,  # Filter : LPCWSTR optional
    wintypes.DWORD,  # Flags : CRED_ENUMERATE_FLAGS optional
    ctypes.POINTER(wintypes.DWORD),  # Count : DWORD* out
    ctypes.c_void_p,  # Credential : CREDENTIALW*** out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
CredEnumerateW = Fiddle::Function.new(
  lib['CredEnumerateW'],
  [
    Fiddle::TYPE_VOIDP,  # Filter : LPCWSTR optional
    -Fiddle::TYPE_INT,  # Flags : CRED_ENUMERATE_FLAGS optional
    Fiddle::TYPE_VOIDP,  # Count : DWORD* out
    Fiddle::TYPE_VOIDP,  # Credential : CREDENTIALW*** out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "advapi32")]
extern "system" {
    fn CredEnumerateW(
        Filter: *const u16,  // LPCWSTR optional
        Flags: u32,  // CRED_ENUMERATE_FLAGS optional
        Count: *mut u32,  // DWORD* out
        Credential: *mut *mut *mut CREDENTIALW  // CREDENTIALW*** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("ADVAPI32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool CredEnumerateW([MarshalAs(UnmanagedType.LPWStr)] string Filter, uint Flags, out uint Count, IntPtr Credential);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_CredEnumerateW' -Namespace Win32 -PassThru
# $api::CredEnumerateW(Filter, Flags, Count, Credential)

#uselib "ADVAPI32.dll"
#func global CredEnumerateW "CredEnumerateW" wptr, wptr, wptr, wptr
; CredEnumerateW Filter, Flags, varptr(Count), varptr(Credential)   ; 戻り値は stat
; Filter : LPCWSTR optional -> "wptr"
; Flags : CRED_ENUMERATE_FLAGS optional -> "wptr"
; Count : DWORD* out -> "wptr"
; Credential : CREDENTIALW*** 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 (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procCredEnumerateW = advapi32.NewProc("CredEnumerateW")
)

// Filter (LPCWSTR optional), Flags (CRED_ENUMERATE_FLAGS optional), Count (DWORD* out), Credential (CREDENTIALW*** out)
r1, _, err := procCredEnumerateW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(Filter))),
	uintptr(Flags),
	uintptr(Count),
	uintptr(Credential),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CredEnumerateW(
  Filter: PWideChar;   // LPCWSTR optional
  Flags: DWORD;   // CRED_ENUMERATE_FLAGS optional
  Count: Pointer;   // DWORD* out
  Credential: Pointer   // CREDENTIALW*** out
): BOOL; stdcall;
  external 'ADVAPI32.dll' name 'CredEnumerateW';

result := DllCall("ADVAPI32\CredEnumerateW"
    , "WStr", Filter   ; LPCWSTR optional
    , "UInt", Flags   ; CRED_ENUMERATE_FLAGS optional
    , "Ptr", Count   ; DWORD* out
    , "Ptr", Credential   ; CREDENTIALW*** out
    , "Int")   ; return: BOOL

●CredEnumerateW(Filter, Flags, Count, Credential) = DLL("ADVAPI32.dll", "bool CredEnumerateW(char*, dword, void*, void*)")
# 呼び出し: CredEnumerateW(Filter, Flags, Count, Credential)
# Filter : LPCWSTR optional -> "char*"
# Flags : CRED_ENUMERATE_FLAGS optional -> "dword"
# Count : DWORD* out -> "void*"
# Credential : CREDENTIALW*** 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 "advapi32" fn CredEnumerateW(
    Filter: [*c]const u16, // LPCWSTR optional
    Flags: u32, // CRED_ENUMERATE_FLAGS optional
    Count: [*c]u32, // DWORD* out
    Credential: [*c][*c][*c]CREDENTIALW // CREDENTIALW*** 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 CredEnumerateW(
    Filter: WideCString,  # LPCWSTR optional
    Flags: uint32,  # CRED_ENUMERATE_FLAGS optional
    Count: ptr uint32,  # DWORD* out
    Credential: ptr CREDENTIALW  # CREDENTIALW*** out
): int32 {.importc: "CredEnumerateW", stdcall, dynlib: "ADVAPI32.dll".}
# Unicode(-W): WideCString は newWideCString("...") で生成。

pragma(lib, "advapi32");
extern(Windows)
int CredEnumerateW(
    const(wchar)* Filter,   // LPCWSTR optional
    uint Flags,   // CRED_ENUMERATE_FLAGS optional
    uint* Count,   // DWORD* out
    CREDENTIALW*** Credential   // CREDENTIALW*** out
);

ccall((:CredEnumerateW, "ADVAPI32.dll"), stdcall, Int32,
      (Cwstring, UInt32, Ptr{UInt32}, Ptr{CREDENTIALW}),
      Filter, Flags, Count, Credential)
# Filter : LPCWSTR optional -> Cwstring
# Flags : CRED_ENUMERATE_FLAGS optional -> UInt32
# Count : DWORD* out -> Ptr{UInt32}
# Credential : CREDENTIALW*** out -> Ptr{CREDENTIALW}
# 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 CredEnumerateW(
    const uint16_t* Filter,
    uint32_t Flags,
    uint32_t* Count,
    void* Credential);
]]
local advapi32 = ffi.load("advapi32")
-- advapi32.CredEnumerateW(Filter, Flags, Count, Credential)
-- Filter : LPCWSTR optional
-- Flags : CRED_ENUMERATE_FLAGS optional
-- Count : DWORD* out
-- Credential : CREDENTIALW*** 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('ADVAPI32.dll');
const CredEnumerateW = lib.func('__stdcall', 'CredEnumerateW', 'int32_t', ['str16', 'uint32_t', 'uint32_t *', 'void *']);
// CredEnumerateW(Filter, Flags, Count, Credential)
// Filter : LPCWSTR optional -> 'str16'
// Flags : CRED_ENUMERATE_FLAGS optional -> 'uint32_t'
// Count : DWORD* out -> 'uint32_t *'
// Credential : CREDENTIALW*** 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("ADVAPI32.dll", {
  CredEnumerateW: { parameters: ["buffer", "u32", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.CredEnumerateW(Filter, Flags, Count, Credential)
// Filter : LPCWSTR optional -> "buffer"
// Flags : CRED_ENUMERATE_FLAGS optional -> "u32"
// Count : DWORD* out -> "pointer"
// Credential : CREDENTIALW*** 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 CredEnumerateW(
    const uint16_t* Filter,
    uint32_t Flags,
    uint32_t* Count,
    void* Credential);
C, "ADVAPI32.dll");
// $ffi->CredEnumerateW(Filter, Flags, Count, Credential);
// Filter : LPCWSTR optional
// Flags : CRED_ENUMERATE_FLAGS optional
// Count : DWORD* out
// Credential : CREDENTIALW*** 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 Advapi32 extends StdCallLibrary {
    Advapi32 INSTANCE = Native.load("advapi32", Advapi32.class, W32APIOptions.UNICODE_OPTIONS);
    boolean CredEnumerateW(
        WString Filter,   // LPCWSTR optional
        int Flags,   // CRED_ENUMERATE_FLAGS optional
        IntByReference Count,   // DWORD* out
        Pointer Credential   // CREDENTIALW*** out
    );
}
// Unicode(-W): WString(入力)/char[](出力)で UTF-16 をマーシャリング。

@[Link("advapi32")]
lib LibADVAPI32
  fun CredEnumerateW = CredEnumerateW(
    Filter : UInt16*,   # LPCWSTR optional
    Flags : UInt32,   # CRED_ENUMERATE_FLAGS optional
    Count : UInt32*,   # DWORD* out
    Credential : CREDENTIALW***   # CREDENTIALW*** 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 CredEnumerateWNative = Int32 Function(Pointer<Utf16>, Uint32, Pointer<Uint32>, Pointer<Void>);
typedef CredEnumerateWDart = int Function(Pointer<Utf16>, int, Pointer<Uint32>, Pointer<Void>);
final CredEnumerateW = DynamicLibrary.open('ADVAPI32.dll')
    .lookupFunction<CredEnumerateWNative, CredEnumerateWDart>('CredEnumerateW');
// Filter : LPCWSTR optional -> Pointer<Utf16>
// Flags : CRED_ENUMERATE_FLAGS optional -> Uint32
// Count : DWORD* out -> Pointer<Uint32>
// Credential : CREDENTIALW*** out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function CredEnumerateW(
  Filter: PWideChar;   // LPCWSTR optional
  Flags: DWORD;   // CRED_ENUMERATE_FLAGS optional
  Count: Pointer;   // DWORD* out
  Credential: Pointer   // CREDENTIALW*** out
): BOOL; stdcall;
  external 'ADVAPI32.dll' name 'CredEnumerateW';

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

foreign import stdcall safe "CredEnumerateW"
  c_CredEnumerateW :: CWString -> Word32 -> Ptr Word32 -> Ptr () -> IO CInt
-- Filter : LPCWSTR optional -> CWString
-- Flags : CRED_ENUMERATE_FLAGS optional -> Word32
-- Count : DWORD* out -> Ptr Word32
-- Credential : CREDENTIALW*** 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 credenumeratew =
  foreign "CredEnumerateW"
    ((ptr uint16_t) @-> uint32_t @-> (ptr uint32_t) @-> (ptr void) @-> returning int32_t)
(* Filter : LPCWSTR optional -> (ptr uint16_t) *)
(* Flags : CRED_ENUMERATE_FLAGS optional -> uint32_t *)
(* Count : DWORD* out -> (ptr uint32_t) *)
(* Credential : CREDENTIALW*** 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 advapi32 (t "ADVAPI32.dll"))
(cffi:use-foreign-library advapi32)

(cffi:defcfun ("CredEnumerateW" cred-enumerate-w :convention :stdcall) :int32
  (filter (:string :encoding :utf-16le))   ; LPCWSTR optional
  (flags :uint32)   ; CRED_ENUMERATE_FLAGS optional
  (count :pointer)   ; DWORD* out
  (credential :pointer))   ; CREDENTIALW*** out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $CredEnumerateW = Win32::API::More->new('ADVAPI32',
    'BOOL CredEnumerateW(LPCWSTR Filter, DWORD Flags, LPVOID Count, LPVOID Credential)');
# my $ret = $CredEnumerateW->Call($Filter, $Flags, $Count, $Credential);
# Filter : LPCWSTR optional -> LPCWSTR
# Flags : CRED_ENUMERATE_FLAGS optional -> DWORD
# Count : DWORD* out -> LPVOID
# Credential : CREDENTIALW*** 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。