FindFirstStreamW

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

HANDLE FindFirstStreamW(
    LPCWSTR lpFileName,
    STREAM_INFO_LEVELS InfoLevel,
    void* lpFindStreamData,
    DWORD dwFlags   // optional
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function FindFirstStreamW(
    <MarshalAs(UnmanagedType.LPWStr)> lpFileName As String,   ' LPCWSTR
    InfoLevel As Integer,   ' STREAM_INFO_LEVELS
    lpFindStreamData As IntPtr,   ' void* out
    dwFlags As UInteger   ' DWORD optional
) As IntPtr
End Function

' lpFileName : LPCWSTR
' InfoLevel : STREAM_INFO_LEVELS
' lpFindStreamData : void* out
' dwFlags : DWORD optional
Declare PtrSafe Function FindFirstStreamW Lib "kernel32" ( _
    ByVal lpFileName As LongPtr, _
    ByVal InfoLevel As Long, _
    ByVal lpFindStreamData As LongPtr, _
    ByVal dwFlags As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

FindFirstStreamW = ctypes.windll.kernel32.FindFirstStreamW
FindFirstStreamW.restype = ctypes.c_void_p
FindFirstStreamW.argtypes = [
    wintypes.LPCWSTR,  # lpFileName : LPCWSTR
    ctypes.c_int,  # InfoLevel : STREAM_INFO_LEVELS
    ctypes.POINTER(None),  # lpFindStreamData : void* out
    wintypes.DWORD,  # dwFlags : DWORD optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
FindFirstStreamW = Fiddle::Function.new(
  lib['FindFirstStreamW'],
  [
    Fiddle::TYPE_VOIDP,  # lpFileName : LPCWSTR
    Fiddle::TYPE_INT,  # InfoLevel : STREAM_INFO_LEVELS
    Fiddle::TYPE_VOIDP,  # lpFindStreamData : void* out
    -Fiddle::TYPE_INT,  # dwFlags : DWORD optional
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "kernel32")]
extern "system" {
    fn FindFirstStreamW(
        lpFileName: *const u16,  // LPCWSTR
        InfoLevel: i32,  // STREAM_INFO_LEVELS
        lpFindStreamData: *mut (),  // void* out
        dwFlags: u32  // DWORD optional
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern IntPtr FindFirstStreamW([MarshalAs(UnmanagedType.LPWStr)] string lpFileName, int InfoLevel, IntPtr lpFindStreamData, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_FindFirstStreamW' -Namespace Win32 -PassThru
# $api::FindFirstStreamW(lpFileName, InfoLevel, lpFindStreamData, dwFlags)

#uselib "KERNEL32.dll"
#func global FindFirstStreamW "FindFirstStreamW" sptr, sptr, sptr, sptr
; FindFirstStreamW lpFileName, InfoLevel, lpFindStreamData, dwFlags   ; 戻り値は stat
; lpFileName : LPCWSTR -> "sptr"
; InfoLevel : STREAM_INFO_LEVELS -> "sptr"
; lpFindStreamData : void* out -> "sptr"
; dwFlags : DWORD optional -> "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。

#uselib "KERNEL32.dll"
#cfunc global FindFirstStreamW "FindFirstStreamW" wstr, int, sptr, int
; res = FindFirstStreamW(lpFileName, InfoLevel, lpFindStreamData, dwFlags)
; lpFileName : LPCWSTR -> "wstr"
; InfoLevel : STREAM_INFO_LEVELS -> "int"
; lpFindStreamData : void* out -> "sptr"
; dwFlags : DWORD optional -> "int"

; HANDLE FindFirstStreamW(LPCWSTR lpFileName, STREAM_INFO_LEVELS InfoLevel, void* lpFindStreamData, DWORD dwFlags)
#uselib "KERNEL32.dll"
#cfunc global FindFirstStreamW "FindFirstStreamW" wstr, int, intptr, int
; res = FindFirstStreamW(lpFileName, InfoLevel, lpFindStreamData, dwFlags)
; lpFileName : LPCWSTR -> "wstr"
; InfoLevel : STREAM_INFO_LEVELS -> "int"
; lpFindStreamData : void* out -> "intptr"
; dwFlags : DWORD optional -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procFindFirstStreamW = kernel32.NewProc("FindFirstStreamW")
)

// lpFileName (LPCWSTR), InfoLevel (STREAM_INFO_LEVELS), lpFindStreamData (void* out), dwFlags (DWORD optional)
r1, _, err := procFindFirstStreamW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpFileName))),
	uintptr(InfoLevel),
	uintptr(lpFindStreamData),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HANDLE

function FindFirstStreamW(
  lpFileName: PWideChar;   // LPCWSTR
  InfoLevel: Integer;   // STREAM_INFO_LEVELS
  lpFindStreamData: Pointer;   // void* out
  dwFlags: DWORD   // DWORD optional
): THandle; stdcall;
  external 'KERNEL32.dll' name 'FindFirstStreamW';

result := DllCall("KERNEL32\FindFirstStreamW"
    , "WStr", lpFileName   ; LPCWSTR
    , "Int", InfoLevel   ; STREAM_INFO_LEVELS
    , "Ptr", lpFindStreamData   ; void* out
    , "UInt", dwFlags   ; DWORD optional
    , "Ptr")   ; return: HANDLE

●FindFirstStreamW(lpFileName, InfoLevel, lpFindStreamData, dwFlags) = DLL("KERNEL32.dll", "void* FindFirstStreamW(char*, int, void*, dword)")
# 呼び出し: FindFirstStreamW(lpFileName, InfoLevel, lpFindStreamData, dwFlags)
# lpFileName : LPCWSTR -> "char*"
# InfoLevel : STREAM_INFO_LEVELS -> "int"
# lpFindStreamData : void* out -> "void*"
# dwFlags : DWORD optional -> "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)。