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。