SetDisplayConfig

// USER32.dll
#include <windows.h>

INT SetDisplayConfig(
    DWORD numPathArrayElements,
    DISPLAYCONFIG_PATH_INFO* pathArray,   // optional
    DWORD numModeInfoArrayElements,
    DISPLAYCONFIG_MODE_INFO* modeInfoArray,   // optional
    SET_DISPLAY_CONFIG_FLAGS flags
);

<DllImport("USER32.dll", ExactSpelling:=True)>
Public Shared Function SetDisplayConfig(
    numPathArrayElements As UInteger,   ' DWORD
    pathArray As IntPtr,   ' DISPLAYCONFIG_PATH_INFO* optional
    numModeInfoArrayElements As UInteger,   ' DWORD
    modeInfoArray As IntPtr,   ' DISPLAYCONFIG_MODE_INFO* optional
    flags As UInteger   ' SET_DISPLAY_CONFIG_FLAGS
) As Integer
End Function

' numPathArrayElements : DWORD
' pathArray : DISPLAYCONFIG_PATH_INFO* optional
' numModeInfoArrayElements : DWORD
' modeInfoArray : DISPLAYCONFIG_MODE_INFO* optional
' flags : SET_DISPLAY_CONFIG_FLAGS
Declare PtrSafe Function SetDisplayConfig Lib "user32" ( _
    ByVal numPathArrayElements As Long, _
    ByVal pathArray As LongPtr, _
    ByVal numModeInfoArrayElements As Long, _
    ByVal modeInfoArray As LongPtr, _
    ByVal flags As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SetDisplayConfig = ctypes.windll.user32.SetDisplayConfig
SetDisplayConfig.restype = ctypes.c_int
SetDisplayConfig.argtypes = [
    wintypes.DWORD,  # numPathArrayElements : DWORD
    ctypes.c_void_p,  # pathArray : DISPLAYCONFIG_PATH_INFO* optional
    wintypes.DWORD,  # numModeInfoArrayElements : DWORD
    ctypes.c_void_p,  # modeInfoArray : DISPLAYCONFIG_MODE_INFO* optional
    wintypes.DWORD,  # flags : SET_DISPLAY_CONFIG_FLAGS
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
SetDisplayConfig = Fiddle::Function.new(
  lib['SetDisplayConfig'],
  [
    -Fiddle::TYPE_INT,  # numPathArrayElements : DWORD
    Fiddle::TYPE_VOIDP,  # pathArray : DISPLAYCONFIG_PATH_INFO* optional
    -Fiddle::TYPE_INT,  # numModeInfoArrayElements : DWORD
    Fiddle::TYPE_VOIDP,  # modeInfoArray : DISPLAYCONFIG_MODE_INFO* optional
    -Fiddle::TYPE_INT,  # flags : SET_DISPLAY_CONFIG_FLAGS
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn SetDisplayConfig(
        numPathArrayElements: u32,  // DWORD
        pathArray: *mut DISPLAYCONFIG_PATH_INFO,  // DISPLAYCONFIG_PATH_INFO* optional
        numModeInfoArrayElements: u32,  // DWORD
        modeInfoArray: *mut DISPLAYCONFIG_MODE_INFO,  // DISPLAYCONFIG_MODE_INFO* optional
        flags: u32  // SET_DISPLAY_CONFIG_FLAGS
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll")]
public static extern int SetDisplayConfig(uint numPathArrayElements, IntPtr pathArray, uint numModeInfoArrayElements, IntPtr modeInfoArray, uint flags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_SetDisplayConfig' -Namespace Win32 -PassThru
# $api::SetDisplayConfig(numPathArrayElements, pathArray, numModeInfoArrayElements, modeInfoArray, flags)

#uselib "USER32.dll"
#func global SetDisplayConfig "SetDisplayConfig" sptr, sptr, sptr, sptr, sptr
; SetDisplayConfig numPathArrayElements, varptr(pathArray), numModeInfoArrayElements, varptr(modeInfoArray), flags   ; 戻り値は stat
; numPathArrayElements : DWORD -> "sptr"
; pathArray : DISPLAYCONFIG_PATH_INFO* optional -> "sptr"
; numModeInfoArrayElements : DWORD -> "sptr"
; modeInfoArray : DISPLAYCONFIG_MODE_INFO* optional -> "sptr"
; flags : SET_DISPLAY_CONFIG_FLAGS -> "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 SetDisplayConfig "SetDisplayConfig" int, var, int, var, int
; res = SetDisplayConfig(numPathArrayElements, pathArray, numModeInfoArrayElements, modeInfoArray, flags)
; numPathArrayElements : DWORD -> "int"
; pathArray : DISPLAYCONFIG_PATH_INFO* optional -> "var"
; numModeInfoArrayElements : DWORD -> "int"
; modeInfoArray : DISPLAYCONFIG_MODE_INFO* optional -> "var"
; flags : SET_DISPLAY_CONFIG_FLAGS -> "int"
; ※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。

; INT SetDisplayConfig(DWORD numPathArrayElements, DISPLAYCONFIG_PATH_INFO* pathArray, DWORD numModeInfoArrayElements, DISPLAYCONFIG_MODE_INFO* modeInfoArray, SET_DISPLAY_CONFIG_FLAGS flags)
#uselib "USER32.dll"
#cfunc global SetDisplayConfig "SetDisplayConfig" int, var, int, var, int
; res = SetDisplayConfig(numPathArrayElements, pathArray, numModeInfoArrayElements, modeInfoArray, flags)
; numPathArrayElements : DWORD -> "int"
; pathArray : DISPLAYCONFIG_PATH_INFO* optional -> "var"
; numModeInfoArrayElements : DWORD -> "int"
; modeInfoArray : DISPLAYCONFIG_MODE_INFO* optional -> "var"
; flags : SET_DISPLAY_CONFIG_FLAGS -> "int"
; ※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")
	procSetDisplayConfig = user32.NewProc("SetDisplayConfig")
)

// numPathArrayElements (DWORD), pathArray (DISPLAYCONFIG_PATH_INFO* optional), numModeInfoArrayElements (DWORD), modeInfoArray (DISPLAYCONFIG_MODE_INFO* optional), flags (SET_DISPLAY_CONFIG_FLAGS)
r1, _, err := procSetDisplayConfig.Call(
	uintptr(numPathArrayElements),
	uintptr(pathArray),
	uintptr(numModeInfoArrayElements),
	uintptr(modeInfoArray),
	uintptr(flags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SetDisplayConfig(
  numPathArrayElements: DWORD;   // DWORD
  pathArray: Pointer;   // DISPLAYCONFIG_PATH_INFO* optional
  numModeInfoArrayElements: DWORD;   // DWORD
  modeInfoArray: Pointer;   // DISPLAYCONFIG_MODE_INFO* optional
  flags: DWORD   // SET_DISPLAY_CONFIG_FLAGS
): Integer; stdcall;
  external 'USER32.dll' name 'SetDisplayConfig';

result := DllCall("USER32\SetDisplayConfig"
    , "UInt", numPathArrayElements   ; DWORD
    , "Ptr", pathArray   ; DISPLAYCONFIG_PATH_INFO* optional
    , "UInt", numModeInfoArrayElements   ; DWORD
    , "Ptr", modeInfoArray   ; DISPLAYCONFIG_MODE_INFO* optional
    , "UInt", flags   ; SET_DISPLAY_CONFIG_FLAGS
    , "Int")   ; return: INT

●SetDisplayConfig(numPathArrayElements, pathArray, numModeInfoArrayElements, modeInfoArray, flags) = DLL("USER32.dll", "int SetDisplayConfig(dword, void*, dword, void*, dword)")
# 呼び出し: SetDisplayConfig(numPathArrayElements, pathArray, numModeInfoArrayElements, modeInfoArray, flags)
# numPathArrayElements : DWORD -> "dword"
# pathArray : DISPLAYCONFIG_PATH_INFO* optional -> "void*"
# numModeInfoArrayElements : DWORD -> "dword"
# modeInfoArray : DISPLAYCONFIG_MODE_INFO* optional -> "void*"
# flags : SET_DISPLAY_CONFIG_FLAGS -> "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)。