EnumDisplaySettingsA

// USER32.dll  (ANSI / -A)
#include <windows.h>

BOOL EnumDisplaySettingsA(
    LPCSTR lpszDeviceName,   // optional
    ENUM_DISPLAY_SETTINGS_MODE iModeNum,
    DEVMODEA* lpDevMode
);

<DllImport("USER32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function EnumDisplaySettingsA(
    <MarshalAs(UnmanagedType.LPStr)> lpszDeviceName As String,   ' LPCSTR optional
    iModeNum As UInteger,   ' ENUM_DISPLAY_SETTINGS_MODE
    lpDevMode As IntPtr   ' DEVMODEA* in/out
) As Boolean
End Function

' lpszDeviceName : LPCSTR optional
' iModeNum : ENUM_DISPLAY_SETTINGS_MODE
' lpDevMode : DEVMODEA* in/out
Declare PtrSafe Function EnumDisplaySettingsA Lib "user32" ( _
    ByVal lpszDeviceName As String, _
    ByVal iModeNum As Long, _
    ByVal lpDevMode 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

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

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
EnumDisplaySettingsA = Fiddle::Function.new(
  lib['EnumDisplaySettingsA'],
  [
    Fiddle::TYPE_VOIDP,  # lpszDeviceName : LPCSTR optional
    -Fiddle::TYPE_INT,  # iModeNum : ENUM_DISPLAY_SETTINGS_MODE
    Fiddle::TYPE_VOIDP,  # lpDevMode : DEVMODEA* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn EnumDisplaySettingsA(
        lpszDeviceName: *const u8,  // LPCSTR optional
        iModeNum: u32,  // ENUM_DISPLAY_SETTINGS_MODE
        lpDevMode: *mut DEVMODEA  // DEVMODEA* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", CharSet = CharSet.Ansi)]
public static extern bool EnumDisplaySettingsA([MarshalAs(UnmanagedType.LPStr)] string lpszDeviceName, uint iModeNum, IntPtr lpDevMode);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_EnumDisplaySettingsA' -Namespace Win32 -PassThru
# $api::EnumDisplaySettingsA(lpszDeviceName, iModeNum, lpDevMode)

#uselib "USER32.dll"
#func global EnumDisplaySettingsA "EnumDisplaySettingsA" sptr, sptr, sptr
; EnumDisplaySettingsA lpszDeviceName, iModeNum, varptr(lpDevMode)   ; 戻り値は stat
; lpszDeviceName : LPCSTR optional -> "sptr"
; iModeNum : ENUM_DISPLAY_SETTINGS_MODE -> "sptr"
; lpDevMode : DEVMODEA* in/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。

#uselib "USER32.dll"
#cfunc global EnumDisplaySettingsA "EnumDisplaySettingsA" str, int, var
; res = EnumDisplaySettingsA(lpszDeviceName, iModeNum, lpDevMode)
; lpszDeviceName : LPCSTR optional -> "str"
; iModeNum : ENUM_DISPLAY_SETTINGS_MODE -> "int"
; lpDevMode : DEVMODEA* 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 EnumDisplaySettingsA(LPCSTR lpszDeviceName, ENUM_DISPLAY_SETTINGS_MODE iModeNum, DEVMODEA* lpDevMode)
#uselib "USER32.dll"
#cfunc global EnumDisplaySettingsA "EnumDisplaySettingsA" str, int, var
; res = EnumDisplaySettingsA(lpszDeviceName, iModeNum, lpDevMode)
; lpszDeviceName : LPCSTR optional -> "str"
; iModeNum : ENUM_DISPLAY_SETTINGS_MODE -> "int"
; lpDevMode : DEVMODEA* 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")
	procEnumDisplaySettingsA = user32.NewProc("EnumDisplaySettingsA")
)

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

function EnumDisplaySettingsA(
  lpszDeviceName: PAnsiChar;   // LPCSTR optional
  iModeNum: DWORD;   // ENUM_DISPLAY_SETTINGS_MODE
  lpDevMode: Pointer   // DEVMODEA* in/out
): BOOL; stdcall;
  external 'USER32.dll' name 'EnumDisplaySettingsA';

result := DllCall("USER32\EnumDisplaySettingsA"
    , "AStr", lpszDeviceName   ; LPCSTR optional
    , "UInt", iModeNum   ; ENUM_DISPLAY_SETTINGS_MODE
    , "Ptr", lpDevMode   ; DEVMODEA* in/out
    , "Int")   ; return: BOOL

●EnumDisplaySettingsA(lpszDeviceName, iModeNum, lpDevMode) = DLL("USER32.dll", "bool EnumDisplaySettingsA(char*, dword, void*)")
# 呼び出し: EnumDisplaySettingsA(lpszDeviceName, iModeNum, lpDevMode)
# lpszDeviceName : LPCSTR optional -> "char*"
# iModeNum : ENUM_DISPLAY_SETTINGS_MODE -> "dword"
# lpDevMode : DEVMODEA* 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)。