EnumDisplaySettingsW

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

BOOL EnumDisplaySettingsW(
    LPCWSTR lpszDeviceName,   // optional
    ENUM_DISPLAY_SETTINGS_MODE iModeNum,
    DEVMODEW* lpDevMode
);

<DllImport("USER32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function EnumDisplaySettingsW(
    <MarshalAs(UnmanagedType.LPWStr)> lpszDeviceName As String,   ' LPCWSTR optional
    iModeNum As UInteger,   ' ENUM_DISPLAY_SETTINGS_MODE
    lpDevMode As IntPtr   ' DEVMODEW* in/out
) As Boolean
End Function

' lpszDeviceName : LPCWSTR optional
' iModeNum : ENUM_DISPLAY_SETTINGS_MODE
' lpDevMode : DEVMODEW* in/out
Declare PtrSafe Function EnumDisplaySettingsW Lib "user32" ( _
    ByVal lpszDeviceName As LongPtr, _
    ByVal iModeNum As Long, _
    ByVal lpDevMode 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

EnumDisplaySettingsW = ctypes.windll.user32.EnumDisplaySettingsW
EnumDisplaySettingsW.restype = wintypes.BOOL
EnumDisplaySettingsW.argtypes = [
    wintypes.LPCWSTR,  # lpszDeviceName : LPCWSTR optional
    wintypes.DWORD,  # iModeNum : ENUM_DISPLAY_SETTINGS_MODE
    ctypes.c_void_p,  # lpDevMode : DEVMODEW* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
EnumDisplaySettingsW = Fiddle::Function.new(
  lib['EnumDisplaySettingsW'],
  [
    Fiddle::TYPE_VOIDP,  # lpszDeviceName : LPCWSTR optional
    -Fiddle::TYPE_INT,  # iModeNum : ENUM_DISPLAY_SETTINGS_MODE
    Fiddle::TYPE_VOIDP,  # lpDevMode : DEVMODEW* in/out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "user32")]
extern "system" {
    fn EnumDisplaySettingsW(
        lpszDeviceName: *const u16,  // LPCWSTR optional
        iModeNum: u32,  // ENUM_DISPLAY_SETTINGS_MODE
        lpDevMode: *mut DEVMODEW  // DEVMODEW* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", CharSet = CharSet.Unicode)]
public static extern bool EnumDisplaySettingsW([MarshalAs(UnmanagedType.LPWStr)] string lpszDeviceName, uint iModeNum, IntPtr lpDevMode);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_EnumDisplaySettingsW' -Namespace Win32 -PassThru
# $api::EnumDisplaySettingsW(lpszDeviceName, iModeNum, lpDevMode)

#uselib "USER32.dll"
#func global EnumDisplaySettingsW "EnumDisplaySettingsW" wptr, wptr, wptr
; EnumDisplaySettingsW lpszDeviceName, iModeNum, varptr(lpDevMode)   ; 戻り値は stat
; lpszDeviceName : LPCWSTR optional -> "wptr"
; iModeNum : ENUM_DISPLAY_SETTINGS_MODE -> "wptr"
; lpDevMode : DEVMODEW* in/out -> "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 "USER32.dll"
#cfunc global EnumDisplaySettingsW "EnumDisplaySettingsW" wstr, int, var
; res = EnumDisplaySettingsW(lpszDeviceName, iModeNum, lpDevMode)
; lpszDeviceName : LPCWSTR optional -> "wstr"
; iModeNum : ENUM_DISPLAY_SETTINGS_MODE -> "int"
; lpDevMode : DEVMODEW* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; BOOL EnumDisplaySettingsW(LPCWSTR lpszDeviceName, ENUM_DISPLAY_SETTINGS_MODE iModeNum, DEVMODEW* lpDevMode)
#uselib "USER32.dll"
#cfunc global EnumDisplaySettingsW "EnumDisplaySettingsW" wstr, int, var
; res = EnumDisplaySettingsW(lpszDeviceName, iModeNum, lpDevMode)
; lpszDeviceName : LPCWSTR optional -> "wstr"
; iModeNum : ENUM_DISPLAY_SETTINGS_MODE -> "int"
; lpDevMode : DEVMODEW* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procEnumDisplaySettingsW = user32.NewProc("EnumDisplaySettingsW")
)

// lpszDeviceName (LPCWSTR optional), iModeNum (ENUM_DISPLAY_SETTINGS_MODE), lpDevMode (DEVMODEW* in/out)
r1, _, err := procEnumDisplaySettingsW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszDeviceName))),
	uintptr(iModeNum),
	uintptr(lpDevMode),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function EnumDisplaySettingsW(
  lpszDeviceName: PWideChar;   // LPCWSTR optional
  iModeNum: DWORD;   // ENUM_DISPLAY_SETTINGS_MODE
  lpDevMode: Pointer   // DEVMODEW* in/out
): BOOL; stdcall;
  external 'USER32.dll' name 'EnumDisplaySettingsW';

result := DllCall("USER32\EnumDisplaySettingsW"
    , "WStr", lpszDeviceName   ; LPCWSTR optional
    , "UInt", iModeNum   ; ENUM_DISPLAY_SETTINGS_MODE
    , "Ptr", lpDevMode   ; DEVMODEW* in/out
    , "Int")   ; return: BOOL

●EnumDisplaySettingsW(lpszDeviceName, iModeNum, lpDevMode) = DLL("USER32.dll", "bool EnumDisplaySettingsW(char*, dword, void*)")
# 呼び出し: EnumDisplaySettingsW(lpszDeviceName, iModeNum, lpDevMode)
# lpszDeviceName : LPCWSTR optional -> "char*"
# iModeNum : ENUM_DISPLAY_SETTINGS_MODE -> "dword"
# lpDevMode : DEVMODEW* in/out -> "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。