FindFirstFileExW

// KERNEL32.dll  (Unicode / -W)
#include <windows.h>

HANDLE FindFirstFileExW(
    LPCWSTR lpFileName,
    FINDEX_INFO_LEVELS fInfoLevelId,
    void* lpFindFileData,
    FINDEX_SEARCH_OPS fSearchOp,
    void* lpSearchFilter,   // optional
    FIND_FIRST_EX_FLAGS dwAdditionalFlags
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function FindFirstFileExW(
    <MarshalAs(UnmanagedType.LPWStr)> lpFileName As String,   ' LPCWSTR
    fInfoLevelId As Integer,   ' FINDEX_INFO_LEVELS
    lpFindFileData As IntPtr,   ' void* out
    fSearchOp As Integer,   ' FINDEX_SEARCH_OPS
    lpSearchFilter As IntPtr,   ' void* optional
    dwAdditionalFlags As UInteger   ' FIND_FIRST_EX_FLAGS
) As IntPtr
End Function

' lpFileName : LPCWSTR
' fInfoLevelId : FINDEX_INFO_LEVELS
' lpFindFileData : void* out
' fSearchOp : FINDEX_SEARCH_OPS
' lpSearchFilter : void* optional
' dwAdditionalFlags : FIND_FIRST_EX_FLAGS
Declare PtrSafe Function FindFirstFileExW Lib "kernel32" ( _
    ByVal lpFileName As LongPtr, _
    ByVal fInfoLevelId As Long, _
    ByVal lpFindFileData As LongPtr, _
    ByVal fSearchOp As Long, _
    ByVal lpSearchFilter As LongPtr, _
    ByVal dwAdditionalFlags As Long) As LongPtr
' 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

FindFirstFileExW = ctypes.windll.kernel32.FindFirstFileExW
FindFirstFileExW.restype = ctypes.c_void_p
FindFirstFileExW.argtypes = [
    wintypes.LPCWSTR,  # lpFileName : LPCWSTR
    ctypes.c_int,  # fInfoLevelId : FINDEX_INFO_LEVELS
    ctypes.POINTER(None),  # lpFindFileData : void* out
    ctypes.c_int,  # fSearchOp : FINDEX_SEARCH_OPS
    ctypes.POINTER(None),  # lpSearchFilter : void* optional
    wintypes.DWORD,  # dwAdditionalFlags : FIND_FIRST_EX_FLAGS
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
FindFirstFileExW = Fiddle::Function.new(
  lib['FindFirstFileExW'],
  [
    Fiddle::TYPE_VOIDP,  # lpFileName : LPCWSTR
    Fiddle::TYPE_INT,  # fInfoLevelId : FINDEX_INFO_LEVELS
    Fiddle::TYPE_VOIDP,  # lpFindFileData : void* out
    Fiddle::TYPE_INT,  # fSearchOp : FINDEX_SEARCH_OPS
    Fiddle::TYPE_VOIDP,  # lpSearchFilter : void* optional
    -Fiddle::TYPE_INT,  # dwAdditionalFlags : FIND_FIRST_EX_FLAGS
  ],
  Fiddle::TYPE_VOIDP)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "kernel32")]
extern "system" {
    fn FindFirstFileExW(
        lpFileName: *const u16,  // LPCWSTR
        fInfoLevelId: i32,  // FINDEX_INFO_LEVELS
        lpFindFileData: *mut (),  // void* out
        fSearchOp: i32,  // FINDEX_SEARCH_OPS
        lpSearchFilter: *mut (),  // void* optional
        dwAdditionalFlags: u32  // FIND_FIRST_EX_FLAGS
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern IntPtr FindFirstFileExW([MarshalAs(UnmanagedType.LPWStr)] string lpFileName, int fInfoLevelId, IntPtr lpFindFileData, int fSearchOp, IntPtr lpSearchFilter, uint dwAdditionalFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_FindFirstFileExW' -Namespace Win32 -PassThru
# $api::FindFirstFileExW(lpFileName, fInfoLevelId, lpFindFileData, fSearchOp, lpSearchFilter, dwAdditionalFlags)

#uselib "KERNEL32.dll"
#func global FindFirstFileExW "FindFirstFileExW" wptr, wptr, wptr, wptr, wptr, wptr
; FindFirstFileExW lpFileName, fInfoLevelId, lpFindFileData, fSearchOp, lpSearchFilter, dwAdditionalFlags   ; 戻り値は stat
; lpFileName : LPCWSTR -> "wptr"
; fInfoLevelId : FINDEX_INFO_LEVELS -> "wptr"
; lpFindFileData : void* out -> "wptr"
; fSearchOp : FINDEX_SEARCH_OPS -> "wptr"
; lpSearchFilter : void* optional -> "wptr"
; dwAdditionalFlags : FIND_FIRST_EX_FLAGS -> "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。

#uselib "KERNEL32.dll"
#cfunc global FindFirstFileExW "FindFirstFileExW" wstr, int, sptr, int, sptr, int
; res = FindFirstFileExW(lpFileName, fInfoLevelId, lpFindFileData, fSearchOp, lpSearchFilter, dwAdditionalFlags)
; lpFileName : LPCWSTR -> "wstr"
; fInfoLevelId : FINDEX_INFO_LEVELS -> "int"
; lpFindFileData : void* out -> "sptr"
; fSearchOp : FINDEX_SEARCH_OPS -> "int"
; lpSearchFilter : void* optional -> "sptr"
; dwAdditionalFlags : FIND_FIRST_EX_FLAGS -> "int"

; HANDLE FindFirstFileExW(LPCWSTR lpFileName, FINDEX_INFO_LEVELS fInfoLevelId, void* lpFindFileData, FINDEX_SEARCH_OPS fSearchOp, void* lpSearchFilter, FIND_FIRST_EX_FLAGS dwAdditionalFlags)
#uselib "KERNEL32.dll"
#cfunc global FindFirstFileExW "FindFirstFileExW" wstr, int, intptr, int, intptr, int
; res = FindFirstFileExW(lpFileName, fInfoLevelId, lpFindFileData, fSearchOp, lpSearchFilter, dwAdditionalFlags)
; lpFileName : LPCWSTR -> "wstr"
; fInfoLevelId : FINDEX_INFO_LEVELS -> "int"
; lpFindFileData : void* out -> "intptr"
; fSearchOp : FINDEX_SEARCH_OPS -> "int"
; lpSearchFilter : void* optional -> "intptr"
; dwAdditionalFlags : FIND_FIRST_EX_FLAGS -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procFindFirstFileExW = kernel32.NewProc("FindFirstFileExW")
)

// lpFileName (LPCWSTR), fInfoLevelId (FINDEX_INFO_LEVELS), lpFindFileData (void* out), fSearchOp (FINDEX_SEARCH_OPS), lpSearchFilter (void* optional), dwAdditionalFlags (FIND_FIRST_EX_FLAGS)
r1, _, err := procFindFirstFileExW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpFileName))),
	uintptr(fInfoLevelId),
	uintptr(lpFindFileData),
	uintptr(fSearchOp),
	uintptr(lpSearchFilter),
	uintptr(dwAdditionalFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HANDLE

function FindFirstFileExW(
  lpFileName: PWideChar;   // LPCWSTR
  fInfoLevelId: Integer;   // FINDEX_INFO_LEVELS
  lpFindFileData: Pointer;   // void* out
  fSearchOp: Integer;   // FINDEX_SEARCH_OPS
  lpSearchFilter: Pointer;   // void* optional
  dwAdditionalFlags: DWORD   // FIND_FIRST_EX_FLAGS
): THandle; stdcall;
  external 'KERNEL32.dll' name 'FindFirstFileExW';

result := DllCall("KERNEL32\FindFirstFileExW"
    , "WStr", lpFileName   ; LPCWSTR
    , "Int", fInfoLevelId   ; FINDEX_INFO_LEVELS
    , "Ptr", lpFindFileData   ; void* out
    , "Int", fSearchOp   ; FINDEX_SEARCH_OPS
    , "Ptr", lpSearchFilter   ; void* optional
    , "UInt", dwAdditionalFlags   ; FIND_FIRST_EX_FLAGS
    , "Ptr")   ; return: HANDLE

●FindFirstFileExW(lpFileName, fInfoLevelId, lpFindFileData, fSearchOp, lpSearchFilter, dwAdditionalFlags) = DLL("KERNEL32.dll", "void* FindFirstFileExW(char*, int, void*, int, void*, dword)")
# 呼び出し: FindFirstFileExW(lpFileName, fInfoLevelId, lpFindFileData, fSearchOp, lpSearchFilter, dwAdditionalFlags)
# lpFileName : LPCWSTR -> "char*"
# fInfoLevelId : FINDEX_INFO_LEVELS -> "int"
# lpFindFileData : void* out -> "void*"
# fSearchOp : FINDEX_SEARCH_OPS -> "int"
# lpSearchFilter : void* optional -> "void*"
# dwAdditionalFlags : FIND_FIRST_EX_FLAGS -> "dword"
# 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 "kernel32" fn FindFirstFileExW(
    lpFileName: [*c]const u16, // LPCWSTR
    fInfoLevelId: i32, // FINDEX_INFO_LEVELS
    lpFindFileData: ?*anyopaque, // void* out
    fSearchOp: i32, // FINDEX_SEARCH_OPS
    lpSearchFilter: ?*anyopaque, // void* optional
    dwAdditionalFlags: u32 // FIND_FIRST_EX_FLAGS
) callconv(std.os.windows.WINAPI) ?*anyopaque;
// Unicode(-W): UTF-16LE のヌル終端バッファ([*c]const u16)を渡す。

proc FindFirstFileExW(
    lpFileName: WideCString,  # LPCWSTR
    fInfoLevelId: int32,  # FINDEX_INFO_LEVELS
    lpFindFileData: pointer,  # void* out
    fSearchOp: int32,  # FINDEX_SEARCH_OPS
    lpSearchFilter: pointer,  # void* optional
    dwAdditionalFlags: uint32  # FIND_FIRST_EX_FLAGS
): pointer {.importc: "FindFirstFileExW", stdcall, dynlib: "KERNEL32.dll".}
# Unicode(-W): WideCString は newWideCString("...") で生成。

pragma(lib, "kernel32");
extern(Windows)
void* FindFirstFileExW(
    const(wchar)* lpFileName,   // LPCWSTR
    int fInfoLevelId,   // FINDEX_INFO_LEVELS
    void* lpFindFileData,   // void* out
    int fSearchOp,   // FINDEX_SEARCH_OPS
    void* lpSearchFilter,   // void* optional
    uint dwAdditionalFlags   // FIND_FIRST_EX_FLAGS
);

ccall((:FindFirstFileExW, "KERNEL32.dll"), stdcall, Ptr{Cvoid},
      (Cwstring, Int32, Ptr{Cvoid}, Int32, Ptr{Cvoid}, UInt32),
      lpFileName, fInfoLevelId, lpFindFileData, fSearchOp, lpSearchFilter, dwAdditionalFlags)
# lpFileName : LPCWSTR -> Cwstring
# fInfoLevelId : FINDEX_INFO_LEVELS -> Int32
# lpFindFileData : void* out -> Ptr{Cvoid}
# fSearchOp : FINDEX_SEARCH_OPS -> Int32
# lpSearchFilter : void* optional -> Ptr{Cvoid}
# dwAdditionalFlags : FIND_FIRST_EX_FLAGS -> 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[[
void* FindFirstFileExW(
    const uint16_t* lpFileName,
    int32_t fInfoLevelId,
    void* lpFindFileData,
    int32_t fSearchOp,
    void* lpSearchFilter,
    uint32_t dwAdditionalFlags);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.FindFirstFileExW(lpFileName, fInfoLevelId, lpFindFileData, fSearchOp, lpSearchFilter, dwAdditionalFlags)
-- lpFileName : LPCWSTR
-- fInfoLevelId : FINDEX_INFO_LEVELS
-- lpFindFileData : void* out
-- fSearchOp : FINDEX_SEARCH_OPS
-- lpSearchFilter : void* optional
-- dwAdditionalFlags : FIND_FIRST_EX_FLAGS
-- 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('KERNEL32.dll');
const FindFirstFileExW = lib.func('__stdcall', 'FindFirstFileExW', 'void *', ['str16', 'int32_t', 'void *', 'int32_t', 'void *', 'uint32_t']);
// FindFirstFileExW(lpFileName, fInfoLevelId, lpFindFileData, fSearchOp, lpSearchFilter, dwAdditionalFlags)
// lpFileName : LPCWSTR -> 'str16'
// fInfoLevelId : FINDEX_INFO_LEVELS -> 'int32_t'
// lpFindFileData : void* out -> 'void *'
// fSearchOp : FINDEX_SEARCH_OPS -> 'int32_t'
// lpSearchFilter : void* optional -> 'void *'
// dwAdditionalFlags : FIND_FIRST_EX_FLAGS -> '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("KERNEL32.dll", {
  FindFirstFileExW: { parameters: ["buffer", "i32", "pointer", "i32", "pointer", "u32"], result: "pointer" },
});
// lib.symbols.FindFirstFileExW(lpFileName, fInfoLevelId, lpFindFileData, fSearchOp, lpSearchFilter, dwAdditionalFlags)
// lpFileName : LPCWSTR -> "buffer"
// fInfoLevelId : FINDEX_INFO_LEVELS -> "i32"
// lpFindFileData : void* out -> "pointer"
// fSearchOp : FINDEX_SEARCH_OPS -> "i32"
// lpSearchFilter : void* optional -> "pointer"
// dwAdditionalFlags : FIND_FIRST_EX_FLAGS -> "u32"
// 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
void* FindFirstFileExW(
    const uint16_t* lpFileName,
    int32_t fInfoLevelId,
    void* lpFindFileData,
    int32_t fSearchOp,
    void* lpSearchFilter,
    uint32_t dwAdditionalFlags);
C, "KERNEL32.dll");
// $ffi->FindFirstFileExW(lpFileName, fInfoLevelId, lpFindFileData, fSearchOp, lpSearchFilter, dwAdditionalFlags);
// lpFileName : LPCWSTR
// fInfoLevelId : FINDEX_INFO_LEVELS
// lpFindFileData : void* out
// fSearchOp : FINDEX_SEARCH_OPS
// lpSearchFilter : void* optional
// dwAdditionalFlags : FIND_FIRST_EX_FLAGS
// 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 Kernel32 extends StdCallLibrary {
    Kernel32 INSTANCE = Native.load("kernel32", Kernel32.class, W32APIOptions.UNICODE_OPTIONS);
    Pointer FindFirstFileExW(
        WString lpFileName,   // LPCWSTR
        int fInfoLevelId,   // FINDEX_INFO_LEVELS
        Pointer lpFindFileData,   // void* out
        int fSearchOp,   // FINDEX_SEARCH_OPS
        Pointer lpSearchFilter,   // void* optional
        int dwAdditionalFlags   // FIND_FIRST_EX_FLAGS
    );
}
// Unicode(-W): WString(入力)/char[](出力)で UTF-16 をマーシャリング。

@[Link("kernel32")]
lib LibKERNEL32
  fun FindFirstFileExW = FindFirstFileExW(
    lpFileName : UInt16*,   # LPCWSTR
    fInfoLevelId : Int32,   # FINDEX_INFO_LEVELS
    lpFindFileData : Void*,   # void* out
    fSearchOp : Int32,   # FINDEX_SEARCH_OPS
    lpSearchFilter : Void*,   # void* optional
    dwAdditionalFlags : UInt32   # FIND_FIRST_EX_FLAGS
  ) : Void*
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 FindFirstFileExWNative = Pointer<Void> Function(Pointer<Utf16>, Int32, Pointer<Void>, Int32, Pointer<Void>, Uint32);
typedef FindFirstFileExWDart = Pointer<Void> Function(Pointer<Utf16>, int, Pointer<Void>, int, Pointer<Void>, int);
final FindFirstFileExW = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<FindFirstFileExWNative, FindFirstFileExWDart>('FindFirstFileExW');
// lpFileName : LPCWSTR -> Pointer<Utf16>
// fInfoLevelId : FINDEX_INFO_LEVELS -> Int32
// lpFindFileData : void* out -> Pointer<Void>
// fSearchOp : FINDEX_SEARCH_OPS -> Int32
// lpSearchFilter : void* optional -> Pointer<Void>
// dwAdditionalFlags : FIND_FIRST_EX_FLAGS -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function FindFirstFileExW(
  lpFileName: PWideChar;   // LPCWSTR
  fInfoLevelId: Integer;   // FINDEX_INFO_LEVELS
  lpFindFileData: Pointer;   // void* out
  fSearchOp: Integer;   // FINDEX_SEARCH_OPS
  lpSearchFilter: Pointer;   // void* optional
  dwAdditionalFlags: DWORD   // FIND_FIRST_EX_FLAGS
): THandle; stdcall;
  external 'KERNEL32.dll' name 'FindFirstFileExW';

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

foreign import stdcall safe "FindFirstFileExW"
  c_FindFirstFileExW :: CWString -> Int32 -> Ptr () -> Int32 -> Ptr () -> Word32 -> IO (Ptr ())
-- lpFileName : LPCWSTR -> CWString
-- fInfoLevelId : FINDEX_INFO_LEVELS -> Int32
-- lpFindFileData : void* out -> Ptr ()
-- fSearchOp : FINDEX_SEARCH_OPS -> Int32
-- lpSearchFilter : void* optional -> Ptr ()
-- dwAdditionalFlags : FIND_FIRST_EX_FLAGS -> 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 findfirstfileexw =
  foreign "FindFirstFileExW"
    ((ptr uint16_t) @-> int32_t @-> (ptr void) @-> int32_t @-> (ptr void) @-> uint32_t @-> returning (ptr void))
(* lpFileName : LPCWSTR -> (ptr uint16_t) *)
(* fInfoLevelId : FINDEX_INFO_LEVELS -> int32_t *)
(* lpFindFileData : void* out -> (ptr void) *)
(* fSearchOp : FINDEX_SEARCH_OPS -> int32_t *)
(* lpSearchFilter : void* optional -> (ptr void) *)
(* dwAdditionalFlags : FIND_FIRST_EX_FLAGS -> 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 kernel32 (t "KERNEL32.dll"))
(cffi:use-foreign-library kernel32)

(cffi:defcfun ("FindFirstFileExW" find-first-file-ex-w :convention :stdcall) :pointer
  (lp-file-name (:string :encoding :utf-16le))   ; LPCWSTR
  (f-info-level-id :int32)   ; FINDEX_INFO_LEVELS
  (lp-find-file-data :pointer)   ; void* out
  (f-search-op :int32)   ; FINDEX_SEARCH_OPS
  (lp-search-filter :pointer)   ; void* optional
  (dw-additional-flags :uint32))   ; FIND_FIRST_EX_FLAGS
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $FindFirstFileExW = Win32::API::More->new('KERNEL32',
    'HANDLE FindFirstFileExW(LPCWSTR lpFileName, int fInfoLevelId, LPVOID lpFindFileData, int fSearchOp, LPVOID lpSearchFilter, DWORD dwAdditionalFlags)');
# my $ret = $FindFirstFileExW->Call($lpFileName, $fInfoLevelId, $lpFindFileData, $fSearchOp, $lpSearchFilter, $dwAdditionalFlags);
# lpFileName : LPCWSTR -> LPCWSTR
# fInfoLevelId : FINDEX_INFO_LEVELS -> int
# lpFindFileData : void* out -> LPVOID
# fSearchOp : FINDEX_SEARCH_OPS -> int
# lpSearchFilter : void* optional -> LPVOID
# dwAdditionalFlags : FIND_FIRST_EX_FLAGS -> DWORD
# 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。