ChangeDisplaySettingsExW

// USER32.dll  (Unicode / -W)
#include <windows.h>

DISP_CHANGE ChangeDisplaySettingsExW(
    LPCWSTR lpszDeviceName,   // optional
    DEVMODEW* lpDevMode,   // optional
    HWND hwnd,   // optional
    CDS_TYPE dwflags,
    void* lParam   // optional
);

<DllImport("USER32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function ChangeDisplaySettingsExW(
    <MarshalAs(UnmanagedType.LPWStr)> lpszDeviceName As String,   ' LPCWSTR optional
    lpDevMode As IntPtr,   ' DEVMODEW* optional
    hwnd As IntPtr,   ' HWND optional
    dwflags As UInteger,   ' CDS_TYPE
    lParam As IntPtr   ' void* optional
) As Integer
End Function

' lpszDeviceName : LPCWSTR optional
' lpDevMode : DEVMODEW* optional
' hwnd : HWND optional
' dwflags : CDS_TYPE
' lParam : void* optional
Declare PtrSafe Function ChangeDisplaySettingsExW Lib "user32" ( _
    ByVal lpszDeviceName As LongPtr, _
    ByVal lpDevMode As LongPtr, _
    ByVal hwnd As LongPtr, _
    ByVal dwflags As Long, _
    ByVal lParam As LongPtr) 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

ChangeDisplaySettingsExW = ctypes.windll.user32.ChangeDisplaySettingsExW
ChangeDisplaySettingsExW.restype = ctypes.c_int
ChangeDisplaySettingsExW.argtypes = [
    wintypes.LPCWSTR,  # lpszDeviceName : LPCWSTR optional
    ctypes.c_void_p,  # lpDevMode : DEVMODEW* optional
    wintypes.HANDLE,  # hwnd : HWND optional
    wintypes.DWORD,  # dwflags : CDS_TYPE
    ctypes.POINTER(None),  # lParam : void* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
ChangeDisplaySettingsExW = Fiddle::Function.new(
  lib['ChangeDisplaySettingsExW'],
  [
    Fiddle::TYPE_VOIDP,  # lpszDeviceName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # lpDevMode : DEVMODEW* optional
    Fiddle::TYPE_VOIDP,  # hwnd : HWND optional
    -Fiddle::TYPE_INT,  # dwflags : CDS_TYPE
    Fiddle::TYPE_VOIDP,  # lParam : void* optional
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "user32")]
extern "system" {
    fn ChangeDisplaySettingsExW(
        lpszDeviceName: *const u16,  // LPCWSTR optional
        lpDevMode: *mut DEVMODEW,  // DEVMODEW* optional
        hwnd: *mut core::ffi::c_void,  // HWND optional
        dwflags: u32,  // CDS_TYPE
        lParam: *mut ()  // void* optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", CharSet = CharSet.Unicode)]
public static extern int ChangeDisplaySettingsExW([MarshalAs(UnmanagedType.LPWStr)] string lpszDeviceName, IntPtr lpDevMode, IntPtr hwnd, uint dwflags, IntPtr lParam);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_ChangeDisplaySettingsExW' -Namespace Win32 -PassThru
# $api::ChangeDisplaySettingsExW(lpszDeviceName, lpDevMode, hwnd, dwflags, lParam)

#uselib "USER32.dll"
#func global ChangeDisplaySettingsExW "ChangeDisplaySettingsExW" wptr, wptr, wptr, wptr, wptr
; ChangeDisplaySettingsExW lpszDeviceName, varptr(lpDevMode), hwnd, dwflags, lParam   ; 戻り値は stat
; lpszDeviceName : LPCWSTR optional -> "wptr"
; lpDevMode : DEVMODEW* optional -> "wptr"
; hwnd : HWND optional -> "wptr"
; dwflags : CDS_TYPE -> "wptr"
; lParam : void* optional -> "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。

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procChangeDisplaySettingsExW = user32.NewProc("ChangeDisplaySettingsExW")
)

// lpszDeviceName (LPCWSTR optional), lpDevMode (DEVMODEW* optional), hwnd (HWND optional), dwflags (CDS_TYPE), lParam (void* optional)
r1, _, err := procChangeDisplaySettingsExW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszDeviceName))),
	uintptr(lpDevMode),
	uintptr(hwnd),
	uintptr(dwflags),
	uintptr(lParam),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DISP_CHANGE

function ChangeDisplaySettingsExW(
  lpszDeviceName: PWideChar;   // LPCWSTR optional
  lpDevMode: Pointer;   // DEVMODEW* optional
  hwnd: THandle;   // HWND optional
  dwflags: DWORD;   // CDS_TYPE
  lParam: Pointer   // void* optional
): Integer; stdcall;
  external 'USER32.dll' name 'ChangeDisplaySettingsExW';

result := DllCall("USER32\ChangeDisplaySettingsExW"
    , "WStr", lpszDeviceName   ; LPCWSTR optional
    , "Ptr", lpDevMode   ; DEVMODEW* optional
    , "Ptr", hwnd   ; HWND optional
    , "UInt", dwflags   ; CDS_TYPE
    , "Ptr", lParam   ; void* optional
    , "Int")   ; return: DISP_CHANGE

●ChangeDisplaySettingsExW(lpszDeviceName, lpDevMode, hwnd, dwflags, lParam) = DLL("USER32.dll", "int ChangeDisplaySettingsExW(char*, void*, void*, dword, void*)")
# 呼び出し: ChangeDisplaySettingsExW(lpszDeviceName, lpDevMode, hwnd, dwflags, lParam)
# lpszDeviceName : LPCWSTR optional -> "char*"
# lpDevMode : DEVMODEW* optional -> "void*"
# hwnd : HWND optional -> "void*"
# dwflags : CDS_TYPE -> "dword"
# lParam : void* optional -> "void*"
# 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 "user32" fn ChangeDisplaySettingsExW(
    lpszDeviceName: [*c]const u16, // LPCWSTR optional
    lpDevMode: [*c]DEVMODEW, // DEVMODEW* optional
    hwnd: ?*anyopaque, // HWND optional
    dwflags: u32, // CDS_TYPE
    lParam: ?*anyopaque // void* optional
) callconv(std.os.windows.WINAPI) i32;
// Unicode(-W): UTF-16LE のヌル終端バッファ([*c]const u16)を渡す。

proc ChangeDisplaySettingsExW(
    lpszDeviceName: WideCString,  # LPCWSTR optional
    lpDevMode: ptr DEVMODEW,  # DEVMODEW* optional
    hwnd: pointer,  # HWND optional
    dwflags: uint32,  # CDS_TYPE
    lParam: pointer  # void* optional
): int32 {.importc: "ChangeDisplaySettingsExW", stdcall, dynlib: "USER32.dll".}
# Unicode(-W): WideCString は newWideCString("...") で生成。

pragma(lib, "user32");
extern(Windows)
int ChangeDisplaySettingsExW(
    const(wchar)* lpszDeviceName,   // LPCWSTR optional
    DEVMODEW* lpDevMode,   // DEVMODEW* optional
    void* hwnd,   // HWND optional
    uint dwflags,   // CDS_TYPE
    void* lParam   // void* optional
);

ccall((:ChangeDisplaySettingsExW, "USER32.dll"), stdcall, Int32,
      (Cwstring, Ptr{DEVMODEW}, Ptr{Cvoid}, UInt32, Ptr{Cvoid}),
      lpszDeviceName, lpDevMode, hwnd, dwflags, lParam)
# lpszDeviceName : LPCWSTR optional -> Cwstring
# lpDevMode : DEVMODEW* optional -> Ptr{DEVMODEW}
# hwnd : HWND optional -> Ptr{Cvoid}
# dwflags : CDS_TYPE -> UInt32
# lParam : void* optional -> Ptr{Cvoid}
# 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[[
int32_t ChangeDisplaySettingsExW(
    const uint16_t* lpszDeviceName,
    void* lpDevMode,
    void* hwnd,
    uint32_t dwflags,
    void* lParam);
]]
local user32 = ffi.load("user32")
-- user32.ChangeDisplaySettingsExW(lpszDeviceName, lpDevMode, hwnd, dwflags, lParam)
-- lpszDeviceName : LPCWSTR optional
-- lpDevMode : DEVMODEW* optional
-- hwnd : HWND optional
-- dwflags : CDS_TYPE
-- lParam : void* optional
-- 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('USER32.dll');
const ChangeDisplaySettingsExW = lib.func('__stdcall', 'ChangeDisplaySettingsExW', 'int32_t', ['str16', 'void *', 'void *', 'uint32_t', 'void *']);
// ChangeDisplaySettingsExW(lpszDeviceName, lpDevMode, hwnd, dwflags, lParam)
// lpszDeviceName : LPCWSTR optional -> 'str16'
// lpDevMode : DEVMODEW* optional -> 'void *'
// hwnd : HWND optional -> 'void *'
// dwflags : CDS_TYPE -> 'uint32_t'
// lParam : void* optional -> 'void *'
// 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("USER32.dll", {
  ChangeDisplaySettingsExW: { parameters: ["buffer", "pointer", "pointer", "u32", "pointer"], result: "i32" },
});
// lib.symbols.ChangeDisplaySettingsExW(lpszDeviceName, lpDevMode, hwnd, dwflags, lParam)
// lpszDeviceName : LPCWSTR optional -> "buffer"
// lpDevMode : DEVMODEW* optional -> "pointer"
// hwnd : HWND optional -> "pointer"
// dwflags : CDS_TYPE -> "u32"
// lParam : void* optional -> "pointer"
// 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
int32_t ChangeDisplaySettingsExW(
    const uint16_t* lpszDeviceName,
    void* lpDevMode,
    void* hwnd,
    uint32_t dwflags,
    void* lParam);
C, "USER32.dll");
// $ffi->ChangeDisplaySettingsExW(lpszDeviceName, lpDevMode, hwnd, dwflags, lParam);
// lpszDeviceName : LPCWSTR optional
// lpDevMode : DEVMODEW* optional
// hwnd : HWND optional
// dwflags : CDS_TYPE
// lParam : void* optional
// 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 User32 extends StdCallLibrary {
    User32 INSTANCE = Native.load("user32", User32.class, W32APIOptions.UNICODE_OPTIONS);
    int ChangeDisplaySettingsExW(
        WString lpszDeviceName,   // LPCWSTR optional
        Pointer lpDevMode,   // DEVMODEW* optional
        Pointer hwnd,   // HWND optional
        int dwflags,   // CDS_TYPE
        Pointer lParam   // void* optional
    );
}
// Unicode(-W): WString(入力)/char[](出力)で UTF-16 をマーシャリング。

@[Link("user32")]
lib LibUSER32
  fun ChangeDisplaySettingsExW = ChangeDisplaySettingsExW(
    lpszDeviceName : UInt16*,   # LPCWSTR optional
    lpDevMode : DEVMODEW*,   # DEVMODEW* optional
    hwnd : Void*,   # HWND optional
    dwflags : UInt32,   # CDS_TYPE
    lParam : Void*   # void* optional
  ) : 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 ChangeDisplaySettingsExWNative = Int32 Function(Pointer<Utf16>, Pointer<Void>, Pointer<Void>, Uint32, Pointer<Void>);
typedef ChangeDisplaySettingsExWDart = int Function(Pointer<Utf16>, Pointer<Void>, Pointer<Void>, int, Pointer<Void>);
final ChangeDisplaySettingsExW = DynamicLibrary.open('USER32.dll')
    .lookupFunction<ChangeDisplaySettingsExWNative, ChangeDisplaySettingsExWDart>('ChangeDisplaySettingsExW');
// lpszDeviceName : LPCWSTR optional -> Pointer<Utf16>
// lpDevMode : DEVMODEW* optional -> Pointer<Void>
// hwnd : HWND optional -> Pointer<Void>
// dwflags : CDS_TYPE -> Uint32
// lParam : void* optional -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function ChangeDisplaySettingsExW(
  lpszDeviceName: PWideChar;   // LPCWSTR optional
  lpDevMode: Pointer;   // DEVMODEW* optional
  hwnd: THandle;   // HWND optional
  dwflags: DWORD;   // CDS_TYPE
  lParam: Pointer   // void* optional
): Integer; stdcall;
  external 'USER32.dll' name 'ChangeDisplaySettingsExW';

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

foreign import stdcall safe "ChangeDisplaySettingsExW"
  c_ChangeDisplaySettingsExW :: CWString -> Ptr () -> Ptr () -> Word32 -> Ptr () -> IO Int32
-- lpszDeviceName : LPCWSTR optional -> CWString
-- lpDevMode : DEVMODEW* optional -> Ptr ()
-- hwnd : HWND optional -> Ptr ()
-- dwflags : CDS_TYPE -> Word32
-- lParam : void* optional -> Ptr ()
-- 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 changedisplaysettingsexw =
  foreign "ChangeDisplaySettingsExW"
    ((ptr uint16_t) @-> (ptr void) @-> (ptr void) @-> uint32_t @-> (ptr void) @-> returning int32_t)
(* lpszDeviceName : LPCWSTR optional -> (ptr uint16_t) *)
(* lpDevMode : DEVMODEW* optional -> (ptr void) *)
(* hwnd : HWND optional -> (ptr void) *)
(* dwflags : CDS_TYPE -> uint32_t *)
(* lParam : void* optional -> (ptr void) *)
(* 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 user32 (t "USER32.dll"))
(cffi:use-foreign-library user32)

(cffi:defcfun ("ChangeDisplaySettingsExW" change-display-settings-ex-w :convention :stdcall) :int32
  (lpsz-device-name (:string :encoding :utf-16le))   ; LPCWSTR optional
  (lp-dev-mode :pointer)   ; DEVMODEW* optional
  (hwnd :pointer)   ; HWND optional
  (dwflags :uint32)   ; CDS_TYPE
  (l-param :pointer))   ; void* optional
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $ChangeDisplaySettingsExW = Win32::API::More->new('USER32',
    'int ChangeDisplaySettingsExW(LPCWSTR lpszDeviceName, LPVOID lpDevMode, HANDLE hwnd, DWORD dwflags, LPVOID lParam)');
# my $ret = $ChangeDisplaySettingsExW->Call($lpszDeviceName, $lpDevMode, $hwnd, $dwflags, $lParam);
# lpszDeviceName : LPCWSTR optional -> LPCWSTR
# lpDevMode : DEVMODEW* optional -> LPVOID
# hwnd : HWND optional -> HANDLE
# dwflags : CDS_TYPE -> DWORD
# lParam : void* optional -> LPVOID
# 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。