GetScaleFactorForDevice

// api-ms-win-shcore-scaling-l1-1-0.dll
#include <windows.h>

DEVICE_SCALE_FACTOR GetScaleFactorForDevice(
    DISPLAY_DEVICE_TYPE deviceType
);

<DllImport("api-ms-win-shcore-scaling-l1-1-0.dll", ExactSpelling:=True)>
Public Shared Function GetScaleFactorForDevice(
    deviceType As Integer   ' DISPLAY_DEVICE_TYPE
) As Integer
End Function

' deviceType : DISPLAY_DEVICE_TYPE
Declare PtrSafe Function GetScaleFactorForDevice Lib "api-ms-win-shcore-scaling-l1-1-0" ( _
    ByVal deviceType 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

GetScaleFactorForDevice = ctypes.windll.LoadLibrary("api-ms-win-shcore-scaling-l1-1-0.dll").GetScaleFactorForDevice
GetScaleFactorForDevice.restype = ctypes.c_int
GetScaleFactorForDevice.argtypes = [
    ctypes.c_int,  # deviceType : DISPLAY_DEVICE_TYPE
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('api-ms-win-shcore-scaling-l1-1-0.dll')
GetScaleFactorForDevice = Fiddle::Function.new(
  lib['GetScaleFactorForDevice'],
  [
    Fiddle::TYPE_INT,  # deviceType : DISPLAY_DEVICE_TYPE
  ],
  Fiddle::TYPE_INT)

#[link(name = "api-ms-win-shcore-scaling-l1-1-0")]
extern "system" {
    fn GetScaleFactorForDevice(
        deviceType: i32  // DISPLAY_DEVICE_TYPE
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("api-ms-win-shcore-scaling-l1-1-0.dll")]
public static extern int GetScaleFactorForDevice(int deviceType);
"@
$api = Add-Type -MemberDefinition $sig -Name 'api-ms-win-shcore-scaling-l1-1-0_GetScaleFactorForDevice' -Namespace Win32 -PassThru
# $api::GetScaleFactorForDevice(deviceType)

#uselib "api-ms-win-shcore-scaling-l1-1-0.dll"
#func global GetScaleFactorForDevice "GetScaleFactorForDevice" sptr
; GetScaleFactorForDevice deviceType   ; 戻り値は stat
; deviceType : DISPLAY_DEVICE_TYPE -> "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 "api-ms-win-shcore-scaling-l1-1-0.dll"
#cfunc global GetScaleFactorForDevice "GetScaleFactorForDevice" int
; res = GetScaleFactorForDevice(deviceType)
; deviceType : DISPLAY_DEVICE_TYPE -> "int"

; DEVICE_SCALE_FACTOR GetScaleFactorForDevice(DISPLAY_DEVICE_TYPE deviceType)
#uselib "api-ms-win-shcore-scaling-l1-1-0.dll"
#cfunc global GetScaleFactorForDevice "GetScaleFactorForDevice" int
; res = GetScaleFactorForDevice(deviceType)
; deviceType : DISPLAY_DEVICE_TYPE -> "int"

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

var (
	api_ms_win_shcore_scaling_l1_1_0 = windows.NewLazySystemDLL("api-ms-win-shcore-scaling-l1-1-0.dll")
	procGetScaleFactorForDevice = api_ms_win_shcore_scaling_l1_1_0.NewProc("GetScaleFactorForDevice")
)

// deviceType (DISPLAY_DEVICE_TYPE)
r1, _, err := procGetScaleFactorForDevice.Call(
	uintptr(deviceType),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DEVICE_SCALE_FACTOR

function GetScaleFactorForDevice(
  deviceType: Integer   // DISPLAY_DEVICE_TYPE
): Integer; stdcall;
  external 'api-ms-win-shcore-scaling-l1-1-0.dll' name 'GetScaleFactorForDevice';

result := DllCall("api-ms-win-shcore-scaling-l1-1-0\GetScaleFactorForDevice"
    , "Int", deviceType   ; DISPLAY_DEVICE_TYPE
    , "Int")   ; return: DEVICE_SCALE_FACTOR

●GetScaleFactorForDevice(deviceType) = DLL("api-ms-win-shcore-scaling-l1-1-0.dll", "int GetScaleFactorForDevice(int)")
# 呼び出し: GetScaleFactorForDevice(deviceType)
# deviceType : DISPLAY_DEVICE_TYPE -> "int"
# 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)。

const std = @import("std");

extern "api-ms-win-shcore-scaling-l1-1-0" fn GetScaleFactorForDevice(
    deviceType: i32 // DISPLAY_DEVICE_TYPE
) callconv(std.os.windows.WINAPI) i32;

proc GetScaleFactorForDevice(
    deviceType: int32  # DISPLAY_DEVICE_TYPE
): int32 {.importc: "GetScaleFactorForDevice", stdcall, dynlib: "api-ms-win-shcore-scaling-l1-1-0.dll".}

pragma(lib, "api-ms-win-shcore-scaling-l1-1-0");
extern(Windows)
int GetScaleFactorForDevice(
    int deviceType   // DISPLAY_DEVICE_TYPE
);

ccall((:GetScaleFactorForDevice, "api-ms-win-shcore-scaling-l1-1-0.dll"), stdcall, Int32,
      (Int32,),
      deviceType)
# deviceType : DISPLAY_DEVICE_TYPE -> Int32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t GetScaleFactorForDevice(
    int32_t deviceType);
]]
local api-ms-win-shcore-scaling-l1-1-0 = ffi.load("api-ms-win-shcore-scaling-l1-1-0")
-- api-ms-win-shcore-scaling-l1-1-0.GetScaleFactorForDevice(deviceType)
-- deviceType : DISPLAY_DEVICE_TYPE
-- 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。

const koffi = require('koffi');
const lib = koffi.load('api-ms-win-shcore-scaling-l1-1-0.dll');
const GetScaleFactorForDevice = lib.func('__stdcall', 'GetScaleFactorForDevice', 'int32_t', ['int32_t']);
// GetScaleFactorForDevice(deviceType)
// deviceType : DISPLAY_DEVICE_TYPE -> 'int32_t'
// 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("api-ms-win-shcore-scaling-l1-1-0.dll", {
  GetScaleFactorForDevice: { parameters: ["i32"], result: "i32" },
});
// lib.symbols.GetScaleFactorForDevice(deviceType)
// deviceType : DISPLAY_DEVICE_TYPE -> "i32"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t GetScaleFactorForDevice(
    int32_t deviceType);
C, "api-ms-win-shcore-scaling-l1-1-0.dll");
// $ffi->GetScaleFactorForDevice(deviceType);
// deviceType : DISPLAY_DEVICE_TYPE
// 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 Api-ms-win-shcore-scaling-l1-1-0 extends StdCallLibrary {
    Api-ms-win-shcore-scaling-l1-1-0 INSTANCE = Native.load("api-ms-win-shcore-scaling-l1-1-0", Api-ms-win-shcore-scaling-l1-1-0.class);
    int GetScaleFactorForDevice(
        int deviceType   // DISPLAY_DEVICE_TYPE
    );
}

@[Link("api-ms-win-shcore-scaling-l1-1-0")]
lib Libapi-ms-win-shcore-scaling-l1-1-0
  fun GetScaleFactorForDevice = GetScaleFactorForDevice(
    deviceType : Int32   # DISPLAY_DEVICE_TYPE
  ) : 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 GetScaleFactorForDeviceNative = Int32 Function(Int32);
typedef GetScaleFactorForDeviceDart = int Function(int);
final GetScaleFactorForDevice = DynamicLibrary.open('api-ms-win-shcore-scaling-l1-1-0.dll')
    .lookupFunction<GetScaleFactorForDeviceNative, GetScaleFactorForDeviceDart>('GetScaleFactorForDevice');
// deviceType : DISPLAY_DEVICE_TYPE -> Int32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function GetScaleFactorForDevice(
  deviceType: Integer   // DISPLAY_DEVICE_TYPE
): Integer; stdcall;
  external 'api-ms-win-shcore-scaling-l1-1-0.dll' name 'GetScaleFactorForDevice';

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

foreign import stdcall safe "GetScaleFactorForDevice"
  c_GetScaleFactorForDevice :: Int32 -> IO Int32
-- deviceType : DISPLAY_DEVICE_TYPE -> Int32
-- 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 getscalefactorfordevice =
  foreign "GetScaleFactorForDevice"
    (int32_t @-> returning int32_t)
(* deviceType : DISPLAY_DEVICE_TYPE -> int32_t *)
(* 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 api-ms-win-shcore-scaling-l1-1-0 (t "api-ms-win-shcore-scaling-l1-1-0.dll"))
(cffi:use-foreign-library api-ms-win-shcore-scaling-l1-1-0)

(cffi:defcfun ("GetScaleFactorForDevice" get-scale-factor-for-device :convention :stdcall) :int32
  (device-type :int32))   ; DISPLAY_DEVICE_TYPE
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $GetScaleFactorForDevice = Win32::API::More->new('api-ms-win-shcore-scaling-l1-1-0',
    'int GetScaleFactorForDevice(int deviceType)');
# my $ret = $GetScaleFactorForDevice->Call($deviceType);
# deviceType : DISPLAY_DEVICE_TYPE -> int
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。