FindNextFileNameW

// KERNEL32.dll
#include <windows.h>

BOOL FindNextFileNameW(
    HANDLE hFindStream,
    DWORD* StringLength,
    LPWSTR LinkName
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function FindNextFileNameW(
    hFindStream As IntPtr,   ' HANDLE
    ByRef StringLength As UInteger,   ' DWORD* in/out
    <MarshalAs(UnmanagedType.LPWStr)> LinkName As System.Text.StringBuilder   ' LPWSTR out
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' hFindStream : HANDLE
' StringLength : DWORD* in/out
' LinkName : LPWSTR out
Declare PtrSafe Function FindNextFileNameW Lib "kernel32" ( _
    ByVal hFindStream As LongPtr, _
    ByRef StringLength As Long, _
    ByVal LinkName As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

FindNextFileNameW = ctypes.windll.kernel32.FindNextFileNameW
FindNextFileNameW.restype = wintypes.BOOL
FindNextFileNameW.argtypes = [
    wintypes.HANDLE,  # hFindStream : HANDLE
    ctypes.POINTER(wintypes.DWORD),  # StringLength : DWORD* in/out
    wintypes.LPWSTR,  # LinkName : LPWSTR out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
FindNextFileNameW = Fiddle::Function.new(
  lib['FindNextFileNameW'],
  [
    Fiddle::TYPE_VOIDP,  # hFindStream : HANDLE
    Fiddle::TYPE_VOIDP,  # StringLength : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # LinkName : LPWSTR out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn FindNextFileNameW(
        hFindStream: *mut core::ffi::c_void,  // HANDLE
        StringLength: *mut u32,  // DWORD* in/out
        LinkName: *mut u16  // LPWSTR out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool FindNextFileNameW(IntPtr hFindStream, ref uint StringLength, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder LinkName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_FindNextFileNameW' -Namespace Win32 -PassThru
# $api::FindNextFileNameW(hFindStream, StringLength, LinkName)

#uselib "KERNEL32.dll"
#func global FindNextFileNameW "FindNextFileNameW" sptr, sptr, sptr
; FindNextFileNameW hFindStream, varptr(StringLength), varptr(LinkName)   ; 戻り値は stat
; hFindStream : HANDLE -> "sptr"
; StringLength : DWORD* in/out -> "sptr"
; LinkName : LPWSTR out -> "sptr"
; ※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 (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procFindNextFileNameW = kernel32.NewProc("FindNextFileNameW")
)

// hFindStream (HANDLE), StringLength (DWORD* in/out), LinkName (LPWSTR out)
r1, _, err := procFindNextFileNameW.Call(
	uintptr(hFindStream),
	uintptr(StringLength),
	uintptr(LinkName),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function FindNextFileNameW(
  hFindStream: THandle;   // HANDLE
  StringLength: Pointer;   // DWORD* in/out
  LinkName: PWideChar   // LPWSTR out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'FindNextFileNameW';

result := DllCall("KERNEL32\FindNextFileNameW"
    , "Ptr", hFindStream   ; HANDLE
    , "Ptr", StringLength   ; DWORD* in/out
    , "Ptr", LinkName   ; LPWSTR out
    , "Int")   ; return: BOOL

●FindNextFileNameW(hFindStream, StringLength, LinkName) = DLL("KERNEL32.dll", "bool FindNextFileNameW(void*, void*, char*)")
# 呼び出し: FindNextFileNameW(hFindStream, StringLength, LinkName)
# hFindStream : HANDLE -> "void*"
# StringLength : DWORD* in/out -> "void*"
# LinkName : LPWSTR out -> "char*"
# 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)。

const std = @import("std");

extern "kernel32" fn FindNextFileNameW(
    hFindStream: ?*anyopaque, // HANDLE
    StringLength: [*c]u32, // DWORD* in/out
    LinkName: [*c]u16 // LPWSTR out
) callconv(std.os.windows.WINAPI) i32;

proc FindNextFileNameW(
    hFindStream: pointer,  # HANDLE
    StringLength: ptr uint32,  # DWORD* in/out
    LinkName: ptr uint16  # LPWSTR out
): int32 {.importc: "FindNextFileNameW", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
int FindNextFileNameW(
    void* hFindStream,   // HANDLE
    uint* StringLength,   // DWORD* in/out
    wchar* LinkName   // LPWSTR out
);

ccall((:FindNextFileNameW, "KERNEL32.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Ptr{UInt32}, Ptr{UInt16}),
      hFindStream, StringLength, LinkName)
# hFindStream : HANDLE -> Ptr{Cvoid}
# StringLength : DWORD* in/out -> Ptr{UInt32}
# LinkName : LPWSTR out -> Ptr{UInt16}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t FindNextFileNameW(
    void* hFindStream,
    uint32_t* StringLength,
    uint16_t* LinkName);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.FindNextFileNameW(hFindStream, StringLength, LinkName)
-- hFindStream : HANDLE
-- StringLength : DWORD* in/out
-- LinkName : 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。

const koffi = require('koffi');
const lib = koffi.load('KERNEL32.dll');
const FindNextFileNameW = lib.func('__stdcall', 'FindNextFileNameW', 'int32_t', ['void *', 'uint32_t *', 'uint16_t *']);
// FindNextFileNameW(hFindStream, StringLength, LinkName)
// hFindStream : HANDLE -> 'void *'
// StringLength : DWORD* in/out -> 'uint32_t *'
// LinkName : LPWSTR out -> 'uint16_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", {
  FindNextFileNameW: { parameters: ["pointer", "pointer", "buffer"], result: "i32" },
});
// lib.symbols.FindNextFileNameW(hFindStream, StringLength, LinkName)
// hFindStream : HANDLE -> "pointer"
// StringLength : DWORD* in/out -> "pointer"
// LinkName : LPWSTR out -> "buffer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t FindNextFileNameW(
    void* hFindStream,
    uint32_t* StringLength,
    uint16_t* LinkName);
C, "KERNEL32.dll");
// $ffi->FindNextFileNameW(hFindStream, StringLength, LinkName);
// hFindStream : HANDLE
// StringLength : DWORD* in/out
// LinkName : 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 Kernel32 extends StdCallLibrary {
    Kernel32 INSTANCE = Native.load("kernel32", Kernel32.class);
    boolean FindNextFileNameW(
        Pointer hFindStream,   // HANDLE
        IntByReference StringLength,   // DWORD* in/out
        char[] LinkName   // LPWSTR out
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun FindNextFileNameW = FindNextFileNameW(
    hFindStream : Void*,   # HANDLE
    StringLength : UInt32*,   # DWORD* in/out
    LinkName : UInt16*   # LPWSTR 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 FindNextFileNameWNative = Int32 Function(Pointer<Void>, Pointer<Uint32>, Pointer<Utf16>);
typedef FindNextFileNameWDart = int Function(Pointer<Void>, Pointer<Uint32>, Pointer<Utf16>);
final FindNextFileNameW = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<FindNextFileNameWNative, FindNextFileNameWDart>('FindNextFileNameW');
// hFindStream : HANDLE -> Pointer<Void>
// StringLength : DWORD* in/out -> Pointer<Uint32>
// LinkName : LPWSTR out -> Pointer<Utf16>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function FindNextFileNameW(
  hFindStream: THandle;   // HANDLE
  StringLength: Pointer;   // DWORD* in/out
  LinkName: PWideChar   // LPWSTR out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'FindNextFileNameW';

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

foreign import stdcall safe "FindNextFileNameW"
  c_FindNextFileNameW :: Ptr () -> Ptr Word32 -> CWString -> IO CInt
-- hFindStream : HANDLE -> Ptr ()
-- StringLength : DWORD* in/out -> Ptr Word32
-- LinkName : LPWSTR out -> 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 findnextfilenamew =
  foreign "FindNextFileNameW"
    ((ptr void) @-> (ptr uint32_t) @-> (ptr uint16_t) @-> returning int32_t)
(* hFindStream : HANDLE -> (ptr void) *)
(* StringLength : DWORD* in/out -> (ptr uint32_t) *)
(* LinkName : LPWSTR out -> (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 kernel32 (t "KERNEL32.dll"))
(cffi:use-foreign-library kernel32)

(cffi:defcfun ("FindNextFileNameW" find-next-file-name-w :convention :stdcall) :int32
  (h-find-stream :pointer)   ; HANDLE
  (string-length :pointer)   ; DWORD* in/out
  (link-name :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 $FindNextFileNameW = Win32::API::More->new('KERNEL32',
    'BOOL FindNextFileNameW(HANDLE hFindStream, LPVOID StringLength, LPWSTR LinkName)');
# my $ret = $FindNextFileNameW->Call($hFindStream, $StringLength, $LinkName);
# hFindStream : HANDLE -> HANDLE
# StringLength : DWORD* in/out -> LPVOID
# LinkName : LPWSTR out -> LPWSTR
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。