SetMonitorDisplayAreaSize

// dxva2.dll
#include <windows.h>

INT SetMonitorDisplayAreaSize(
    HANDLE hMonitor,
    MC_SIZE_TYPE stSizeType,
    DWORD dwNewDisplayAreaWidthOrHeight
);

<DllImport("dxva2.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetMonitorDisplayAreaSize(
    hMonitor As IntPtr,   ' HANDLE
    stSizeType As Integer,   ' MC_SIZE_TYPE
    dwNewDisplayAreaWidthOrHeight As UInteger   ' DWORD
) As Integer
End Function

' hMonitor : HANDLE
' stSizeType : MC_SIZE_TYPE
' dwNewDisplayAreaWidthOrHeight : DWORD
Declare PtrSafe Function SetMonitorDisplayAreaSize Lib "dxva2" ( _
    ByVal hMonitor As LongPtr, _
    ByVal stSizeType As Long, _
    ByVal dwNewDisplayAreaWidthOrHeight 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

SetMonitorDisplayAreaSize = ctypes.windll.dxva2.SetMonitorDisplayAreaSize
SetMonitorDisplayAreaSize.restype = ctypes.c_int
SetMonitorDisplayAreaSize.argtypes = [
    wintypes.HANDLE,  # hMonitor : HANDLE
    ctypes.c_int,  # stSizeType : MC_SIZE_TYPE
    wintypes.DWORD,  # dwNewDisplayAreaWidthOrHeight : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dxva2.dll')
SetMonitorDisplayAreaSize = Fiddle::Function.new(
  lib['SetMonitorDisplayAreaSize'],
  [
    Fiddle::TYPE_VOIDP,  # hMonitor : HANDLE
    Fiddle::TYPE_INT,  # stSizeType : MC_SIZE_TYPE
    -Fiddle::TYPE_INT,  # dwNewDisplayAreaWidthOrHeight : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "dxva2")]
extern "system" {
    fn SetMonitorDisplayAreaSize(
        hMonitor: *mut core::ffi::c_void,  // HANDLE
        stSizeType: i32,  // MC_SIZE_TYPE
        dwNewDisplayAreaWidthOrHeight: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dxva2.dll", SetLastError = true)]
public static extern int SetMonitorDisplayAreaSize(IntPtr hMonitor, int stSizeType, uint dwNewDisplayAreaWidthOrHeight);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dxva2_SetMonitorDisplayAreaSize' -Namespace Win32 -PassThru
# $api::SetMonitorDisplayAreaSize(hMonitor, stSizeType, dwNewDisplayAreaWidthOrHeight)

#uselib "dxva2.dll"
#func global SetMonitorDisplayAreaSize "SetMonitorDisplayAreaSize" sptr, sptr, sptr
; SetMonitorDisplayAreaSize hMonitor, stSizeType, dwNewDisplayAreaWidthOrHeight   ; 戻り値は stat
; hMonitor : HANDLE -> "sptr"
; stSizeType : MC_SIZE_TYPE -> "sptr"
; dwNewDisplayAreaWidthOrHeight : DWORD -> "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 "dxva2.dll"
#cfunc global SetMonitorDisplayAreaSize "SetMonitorDisplayAreaSize" sptr, int, int
; res = SetMonitorDisplayAreaSize(hMonitor, stSizeType, dwNewDisplayAreaWidthOrHeight)
; hMonitor : HANDLE -> "sptr"
; stSizeType : MC_SIZE_TYPE -> "int"
; dwNewDisplayAreaWidthOrHeight : DWORD -> "int"

; INT SetMonitorDisplayAreaSize(HANDLE hMonitor, MC_SIZE_TYPE stSizeType, DWORD dwNewDisplayAreaWidthOrHeight)
#uselib "dxva2.dll"
#cfunc global SetMonitorDisplayAreaSize "SetMonitorDisplayAreaSize" intptr, int, int
; res = SetMonitorDisplayAreaSize(hMonitor, stSizeType, dwNewDisplayAreaWidthOrHeight)
; hMonitor : HANDLE -> "intptr"
; stSizeType : MC_SIZE_TYPE -> "int"
; dwNewDisplayAreaWidthOrHeight : DWORD -> "int"

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

var (
	dxva2 = windows.NewLazySystemDLL("dxva2.dll")
	procSetMonitorDisplayAreaSize = dxva2.NewProc("SetMonitorDisplayAreaSize")
)

// hMonitor (HANDLE), stSizeType (MC_SIZE_TYPE), dwNewDisplayAreaWidthOrHeight (DWORD)
r1, _, err := procSetMonitorDisplayAreaSize.Call(
	uintptr(hMonitor),
	uintptr(stSizeType),
	uintptr(dwNewDisplayAreaWidthOrHeight),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SetMonitorDisplayAreaSize(
  hMonitor: THandle;   // HANDLE
  stSizeType: Integer;   // MC_SIZE_TYPE
  dwNewDisplayAreaWidthOrHeight: DWORD   // DWORD
): Integer; stdcall;
  external 'dxva2.dll' name 'SetMonitorDisplayAreaSize';

result := DllCall("dxva2\SetMonitorDisplayAreaSize"
    , "Ptr", hMonitor   ; HANDLE
    , "Int", stSizeType   ; MC_SIZE_TYPE
    , "UInt", dwNewDisplayAreaWidthOrHeight   ; DWORD
    , "Int")   ; return: INT

●SetMonitorDisplayAreaSize(hMonitor, stSizeType, dwNewDisplayAreaWidthOrHeight) = DLL("dxva2.dll", "int SetMonitorDisplayAreaSize(void*, int, dword)")
# 呼び出し: SetMonitorDisplayAreaSize(hMonitor, stSizeType, dwNewDisplayAreaWidthOrHeight)
# hMonitor : HANDLE -> "void*"
# stSizeType : MC_SIZE_TYPE -> "int"
# dwNewDisplayAreaWidthOrHeight : DWORD -> "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)。