DwmIsCompositionEnabled

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

HRESULT DwmIsCompositionEnabled(
    BOOL* pfEnabled
);

<DllImport("dwmapi.dll", ExactSpelling:=True)>
Public Shared Function DwmIsCompositionEnabled(
    <Out> ByRef pfEnabled As Boolean   ' BOOL* out
) As Integer
End Function

' pfEnabled : BOOL* out
Declare PtrSafe Function DwmIsCompositionEnabled Lib "dwmapi" ( _
    ByRef pfEnabled 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

DwmIsCompositionEnabled = ctypes.windll.dwmapi.DwmIsCompositionEnabled
DwmIsCompositionEnabled.restype = ctypes.c_int
DwmIsCompositionEnabled.argtypes = [
    ctypes.c_void_p,  # pfEnabled : BOOL* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dwmapi.dll')
DwmIsCompositionEnabled = Fiddle::Function.new(
  lib['DwmIsCompositionEnabled'],
  [
    Fiddle::TYPE_VOIDP,  # pfEnabled : BOOL* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "dwmapi")]
extern "system" {
    fn DwmIsCompositionEnabled(
        pfEnabled: *mut i32  // BOOL* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dwmapi.dll")]
public static extern int DwmIsCompositionEnabled(out bool pfEnabled);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dwmapi_DwmIsCompositionEnabled' -Namespace Win32 -PassThru
# $api::DwmIsCompositionEnabled(pfEnabled)

#uselib "dwmapi.dll"
#func global DwmIsCompositionEnabled "DwmIsCompositionEnabled" sptr
; DwmIsCompositionEnabled varptr(pfEnabled)   ; 戻り値は stat
; pfEnabled : BOOL* 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。

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

var (
	dwmapi = windows.NewLazySystemDLL("dwmapi.dll")
	procDwmIsCompositionEnabled = dwmapi.NewProc("DwmIsCompositionEnabled")
)

// pfEnabled (BOOL* out)
r1, _, err := procDwmIsCompositionEnabled.Call(
	uintptr(pfEnabled),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function DwmIsCompositionEnabled(
  pfEnabled: Pointer   // BOOL* out
): Integer; stdcall;
  external 'dwmapi.dll' name 'DwmIsCompositionEnabled';

result := DllCall("dwmapi\DwmIsCompositionEnabled"
    , "Ptr", pfEnabled   ; BOOL* out
    , "Int")   ; return: HRESULT

●DwmIsCompositionEnabled(pfEnabled) = DLL("dwmapi.dll", "int DwmIsCompositionEnabled(void*)")
# 呼び出し: DwmIsCompositionEnabled(pfEnabled)
# pfEnabled : BOOL* 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)。

const std = @import("std");

extern "dwmapi" fn DwmIsCompositionEnabled(
    pfEnabled: [*c]i32 // BOOL* out
) callconv(std.os.windows.WINAPI) i32;

proc DwmIsCompositionEnabled(
    pfEnabled: ptr int32  # BOOL* out
): int32 {.importc: "DwmIsCompositionEnabled", stdcall, dynlib: "dwmapi.dll".}

pragma(lib, "dwmapi");
extern(Windows)
int DwmIsCompositionEnabled(
    int* pfEnabled   // BOOL* out
);

ccall((:DwmIsCompositionEnabled, "dwmapi.dll"), stdcall, Int32,
      (Ptr{Int32},),
      pfEnabled)
# pfEnabled : BOOL* out -> Ptr{Int32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t DwmIsCompositionEnabled(
    int32_t* pfEnabled);
]]
local dwmapi = ffi.load("dwmapi")
-- dwmapi.DwmIsCompositionEnabled(pfEnabled)
-- pfEnabled : BOOL* out
-- 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('dwmapi.dll');
const DwmIsCompositionEnabled = lib.func('__stdcall', 'DwmIsCompositionEnabled', 'int32_t', ['int32_t *']);
// DwmIsCompositionEnabled(pfEnabled)
// pfEnabled : BOOL* out -> '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("dwmapi.dll", {
  DwmIsCompositionEnabled: { parameters: ["pointer"], result: "i32" },
});
// lib.symbols.DwmIsCompositionEnabled(pfEnabled)
// pfEnabled : BOOL* out -> "pointer"
// 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 DwmIsCompositionEnabled(
    int32_t* pfEnabled);
C, "dwmapi.dll");
// $ffi->DwmIsCompositionEnabled(pfEnabled);
// pfEnabled : BOOL* out
// 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 Dwmapi extends StdCallLibrary {
    Dwmapi INSTANCE = Native.load("dwmapi", Dwmapi.class);
    int DwmIsCompositionEnabled(
        IntByReference pfEnabled   // BOOL* out
    );
}

@[Link("dwmapi")]
lib Libdwmapi
  fun DwmIsCompositionEnabled = DwmIsCompositionEnabled(
    pfEnabled : Int32*   # BOOL* out
  ) : 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 DwmIsCompositionEnabledNative = Int32 Function(Pointer<Int32>);
typedef DwmIsCompositionEnabledDart = int Function(Pointer<Int32>);
final DwmIsCompositionEnabled = DynamicLibrary.open('dwmapi.dll')
    .lookupFunction<DwmIsCompositionEnabledNative, DwmIsCompositionEnabledDart>('DwmIsCompositionEnabled');
// pfEnabled : BOOL* out -> Pointer<Int32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DwmIsCompositionEnabled(
  pfEnabled: Pointer   // BOOL* out
): Integer; stdcall;
  external 'dwmapi.dll' name 'DwmIsCompositionEnabled';

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

foreign import stdcall safe "DwmIsCompositionEnabled"
  c_DwmIsCompositionEnabled :: Ptr CInt -> IO Int32
-- pfEnabled : BOOL* out -> Ptr CInt
-- 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 dwmiscompositionenabled =
  foreign "DwmIsCompositionEnabled"
    ((ptr int32_t) @-> returning int32_t)
(* pfEnabled : BOOL* out -> (ptr 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 dwmapi (t "dwmapi.dll"))
(cffi:use-foreign-library dwmapi)

(cffi:defcfun ("DwmIsCompositionEnabled" dwm-is-composition-enabled :convention :stdcall) :int32
  (pf-enabled :pointer))   ; BOOL* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $DwmIsCompositionEnabled = Win32::API::More->new('dwmapi',
    'int DwmIsCompositionEnabled(LPVOID pfEnabled)');
# my $ret = $DwmIsCompositionEnabled->Call($pfEnabled);
# pfEnabled : BOOL* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。