SetFileAttributesW

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

BOOL SetFileAttributesW(
    LPCWSTR lpFileName,
    FILE_FLAGS_AND_ATTRIBUTES dwFileAttributes
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetFileAttributesW(
    <MarshalAs(UnmanagedType.LPWStr)> lpFileName As String,   ' LPCWSTR
    dwFileAttributes As UInteger   ' FILE_FLAGS_AND_ATTRIBUTES
) As Boolean
End Function

' lpFileName : LPCWSTR
' dwFileAttributes : FILE_FLAGS_AND_ATTRIBUTES
Declare PtrSafe Function SetFileAttributesW Lib "kernel32" ( _
    ByVal lpFileName As LongPtr, _
    ByVal dwFileAttributes As Long) 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

SetFileAttributesW = ctypes.windll.kernel32.SetFileAttributesW
SetFileAttributesW.restype = wintypes.BOOL
SetFileAttributesW.argtypes = [
    wintypes.LPCWSTR,  # lpFileName : LPCWSTR
    wintypes.DWORD,  # dwFileAttributes : FILE_FLAGS_AND_ATTRIBUTES
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
SetFileAttributesW = Fiddle::Function.new(
  lib['SetFileAttributesW'],
  [
    Fiddle::TYPE_VOIDP,  # lpFileName : LPCWSTR
    -Fiddle::TYPE_INT,  # dwFileAttributes : FILE_FLAGS_AND_ATTRIBUTES
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "kernel32")]
extern "system" {
    fn SetFileAttributesW(
        lpFileName: *const u16,  // LPCWSTR
        dwFileAttributes: u32  // FILE_FLAGS_AND_ATTRIBUTES
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool SetFileAttributesW([MarshalAs(UnmanagedType.LPWStr)] string lpFileName, uint dwFileAttributes);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_SetFileAttributesW' -Namespace Win32 -PassThru
# $api::SetFileAttributesW(lpFileName, dwFileAttributes)

#uselib "KERNEL32.dll"
#func global SetFileAttributesW "SetFileAttributesW" wptr, wptr
; SetFileAttributesW lpFileName, dwFileAttributes   ; 戻り値は stat
; lpFileName : LPCWSTR -> "wptr"
; dwFileAttributes : FILE_FLAGS_AND_ATTRIBUTES -> "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 SetFileAttributesW "SetFileAttributesW" wstr, int
; res = SetFileAttributesW(lpFileName, dwFileAttributes)
; lpFileName : LPCWSTR -> "wstr"
; dwFileAttributes : FILE_FLAGS_AND_ATTRIBUTES -> "int"

; BOOL SetFileAttributesW(LPCWSTR lpFileName, FILE_FLAGS_AND_ATTRIBUTES dwFileAttributes)
#uselib "KERNEL32.dll"
#cfunc global SetFileAttributesW "SetFileAttributesW" wstr, int
; res = SetFileAttributesW(lpFileName, dwFileAttributes)
; lpFileName : LPCWSTR -> "wstr"
; dwFileAttributes : FILE_FLAGS_AND_ATTRIBUTES -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procSetFileAttributesW = kernel32.NewProc("SetFileAttributesW")
)

// lpFileName (LPCWSTR), dwFileAttributes (FILE_FLAGS_AND_ATTRIBUTES)
r1, _, err := procSetFileAttributesW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpFileName))),
	uintptr(dwFileAttributes),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SetFileAttributesW(
  lpFileName: PWideChar;   // LPCWSTR
  dwFileAttributes: DWORD   // FILE_FLAGS_AND_ATTRIBUTES
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'SetFileAttributesW';

result := DllCall("KERNEL32\SetFileAttributesW"
    , "WStr", lpFileName   ; LPCWSTR
    , "UInt", dwFileAttributes   ; FILE_FLAGS_AND_ATTRIBUTES
    , "Int")   ; return: BOOL

●SetFileAttributesW(lpFileName, dwFileAttributes) = DLL("KERNEL32.dll", "bool SetFileAttributesW(char*, dword)")
# 呼び出し: SetFileAttributesW(lpFileName, dwFileAttributes)
# lpFileName : LPCWSTR -> "char*"
# dwFileAttributes : FILE_FLAGS_AND_ATTRIBUTES -> "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。