DwmGetWindowAttribute

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

HRESULT DwmGetWindowAttribute(
    HWND hwnd,
    DWORD dwAttribute,
    void* pvAttribute,
    DWORD cbAttribute
);

<DllImport("dwmapi.dll", ExactSpelling:=True)>
Public Shared Function DwmGetWindowAttribute(
    hwnd As IntPtr,   ' HWND
    dwAttribute As UInteger,   ' DWORD
    pvAttribute As IntPtr,   ' void* out
    cbAttribute As UInteger   ' DWORD
) As Integer
End Function

' hwnd : HWND
' dwAttribute : DWORD
' pvAttribute : void* out
' cbAttribute : DWORD
Declare PtrSafe Function DwmGetWindowAttribute Lib "dwmapi" ( _
    ByVal hwnd As LongPtr, _
    ByVal dwAttribute As Long, _
    ByVal pvAttribute As LongPtr, _
    ByVal cbAttribute 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

DwmGetWindowAttribute = ctypes.windll.dwmapi.DwmGetWindowAttribute
DwmGetWindowAttribute.restype = ctypes.c_int
DwmGetWindowAttribute.argtypes = [
    wintypes.HANDLE,  # hwnd : HWND
    wintypes.DWORD,  # dwAttribute : DWORD
    ctypes.POINTER(None),  # pvAttribute : void* out
    wintypes.DWORD,  # cbAttribute : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dwmapi.dll')
DwmGetWindowAttribute = Fiddle::Function.new(
  lib['DwmGetWindowAttribute'],
  [
    Fiddle::TYPE_VOIDP,  # hwnd : HWND
    -Fiddle::TYPE_INT,  # dwAttribute : DWORD
    Fiddle::TYPE_VOIDP,  # pvAttribute : void* out
    -Fiddle::TYPE_INT,  # cbAttribute : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "dwmapi")]
extern "system" {
    fn DwmGetWindowAttribute(
        hwnd: *mut core::ffi::c_void,  // HWND
        dwAttribute: u32,  // DWORD
        pvAttribute: *mut (),  // void* out
        cbAttribute: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dwmapi.dll")]
public static extern int DwmGetWindowAttribute(IntPtr hwnd, uint dwAttribute, IntPtr pvAttribute, uint cbAttribute);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dwmapi_DwmGetWindowAttribute' -Namespace Win32 -PassThru
# $api::DwmGetWindowAttribute(hwnd, dwAttribute, pvAttribute, cbAttribute)

#uselib "dwmapi.dll"
#func global DwmGetWindowAttribute "DwmGetWindowAttribute" sptr, sptr, sptr, sptr
; DwmGetWindowAttribute hwnd, dwAttribute, pvAttribute, cbAttribute   ; 戻り値は stat
; hwnd : HWND -> "sptr"
; dwAttribute : DWORD -> "sptr"
; pvAttribute : void* out -> "sptr"
; cbAttribute : 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 "dwmapi.dll"
#cfunc global DwmGetWindowAttribute "DwmGetWindowAttribute" sptr, int, sptr, int
; res = DwmGetWindowAttribute(hwnd, dwAttribute, pvAttribute, cbAttribute)
; hwnd : HWND -> "sptr"
; dwAttribute : DWORD -> "int"
; pvAttribute : void* out -> "sptr"
; cbAttribute : DWORD -> "int"

; HRESULT DwmGetWindowAttribute(HWND hwnd, DWORD dwAttribute, void* pvAttribute, DWORD cbAttribute)
#uselib "dwmapi.dll"
#cfunc global DwmGetWindowAttribute "DwmGetWindowAttribute" intptr, int, intptr, int
; res = DwmGetWindowAttribute(hwnd, dwAttribute, pvAttribute, cbAttribute)
; hwnd : HWND -> "intptr"
; dwAttribute : DWORD -> "int"
; pvAttribute : void* out -> "intptr"
; cbAttribute : DWORD -> "int"

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

var (
	dwmapi = windows.NewLazySystemDLL("dwmapi.dll")
	procDwmGetWindowAttribute = dwmapi.NewProc("DwmGetWindowAttribute")
)

// hwnd (HWND), dwAttribute (DWORD), pvAttribute (void* out), cbAttribute (DWORD)
r1, _, err := procDwmGetWindowAttribute.Call(
	uintptr(hwnd),
	uintptr(dwAttribute),
	uintptr(pvAttribute),
	uintptr(cbAttribute),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function DwmGetWindowAttribute(
  hwnd: THandle;   // HWND
  dwAttribute: DWORD;   // DWORD
  pvAttribute: Pointer;   // void* out
  cbAttribute: DWORD   // DWORD
): Integer; stdcall;
  external 'dwmapi.dll' name 'DwmGetWindowAttribute';

result := DllCall("dwmapi\DwmGetWindowAttribute"
    , "Ptr", hwnd   ; HWND
    , "UInt", dwAttribute   ; DWORD
    , "Ptr", pvAttribute   ; void* out
    , "UInt", cbAttribute   ; DWORD
    , "Int")   ; return: HRESULT

●DwmGetWindowAttribute(hwnd, dwAttribute, pvAttribute, cbAttribute) = DLL("dwmapi.dll", "int DwmGetWindowAttribute(void*, dword, void*, dword)")
# 呼び出し: DwmGetWindowAttribute(hwnd, dwAttribute, pvAttribute, cbAttribute)
# hwnd : HWND -> "void*"
# dwAttribute : DWORD -> "dword"
# pvAttribute : void* out -> "void*"
# cbAttribute : 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)。

const std = @import("std");

extern "dwmapi" fn DwmGetWindowAttribute(
    hwnd: ?*anyopaque, // HWND
    dwAttribute: u32, // DWORD
    pvAttribute: ?*anyopaque, // void* out
    cbAttribute: u32 // DWORD
) callconv(std.os.windows.WINAPI) i32;

proc DwmGetWindowAttribute(
    hwnd: pointer,  # HWND
    dwAttribute: uint32,  # DWORD
    pvAttribute: pointer,  # void* out
    cbAttribute: uint32  # DWORD
): int32 {.importc: "DwmGetWindowAttribute", stdcall, dynlib: "dwmapi.dll".}

pragma(lib, "dwmapi");
extern(Windows)
int DwmGetWindowAttribute(
    void* hwnd,   // HWND
    uint dwAttribute,   // DWORD
    void* pvAttribute,   // void* out
    uint cbAttribute   // DWORD
);

ccall((:DwmGetWindowAttribute, "dwmapi.dll"), stdcall, Int32,
      (Ptr{Cvoid}, UInt32, Ptr{Cvoid}, UInt32),
      hwnd, dwAttribute, pvAttribute, cbAttribute)
# hwnd : HWND -> Ptr{Cvoid}
# dwAttribute : DWORD -> UInt32
# pvAttribute : void* out -> Ptr{Cvoid}
# cbAttribute : DWORD -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t DwmGetWindowAttribute(
    void* hwnd,
    uint32_t dwAttribute,
    void* pvAttribute,
    uint32_t cbAttribute);
]]
local dwmapi = ffi.load("dwmapi")
-- dwmapi.DwmGetWindowAttribute(hwnd, dwAttribute, pvAttribute, cbAttribute)
-- hwnd : HWND
-- dwAttribute : DWORD
-- pvAttribute : void* out
-- cbAttribute : DWORD
-- 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 DwmGetWindowAttribute = lib.func('__stdcall', 'DwmGetWindowAttribute', 'int32_t', ['void *', 'uint32_t', 'void *', 'uint32_t']);
// DwmGetWindowAttribute(hwnd, dwAttribute, pvAttribute, cbAttribute)
// hwnd : HWND -> 'void *'
// dwAttribute : DWORD -> 'uint32_t'
// pvAttribute : void* out -> 'void *'
// cbAttribute : DWORD -> 'uint32_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", {
  DwmGetWindowAttribute: { parameters: ["pointer", "u32", "pointer", "u32"], result: "i32" },
});
// lib.symbols.DwmGetWindowAttribute(hwnd, dwAttribute, pvAttribute, cbAttribute)
// hwnd : HWND -> "pointer"
// dwAttribute : DWORD -> "u32"
// pvAttribute : void* out -> "pointer"
// cbAttribute : DWORD -> "u32"
// 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 DwmGetWindowAttribute(
    void* hwnd,
    uint32_t dwAttribute,
    void* pvAttribute,
    uint32_t cbAttribute);
C, "dwmapi.dll");
// $ffi->DwmGetWindowAttribute(hwnd, dwAttribute, pvAttribute, cbAttribute);
// hwnd : HWND
// dwAttribute : DWORD
// pvAttribute : void* out
// cbAttribute : DWORD
// 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 DwmGetWindowAttribute(
        Pointer hwnd,   // HWND
        int dwAttribute,   // DWORD
        Pointer pvAttribute,   // void* out
        int cbAttribute   // DWORD
    );
}

@[Link("dwmapi")]
lib Libdwmapi
  fun DwmGetWindowAttribute = DwmGetWindowAttribute(
    hwnd : Void*,   # HWND
    dwAttribute : UInt32,   # DWORD
    pvAttribute : Void*,   # void* out
    cbAttribute : UInt32   # DWORD
  ) : 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 DwmGetWindowAttributeNative = Int32 Function(Pointer<Void>, Uint32, Pointer<Void>, Uint32);
typedef DwmGetWindowAttributeDart = int Function(Pointer<Void>, int, Pointer<Void>, int);
final DwmGetWindowAttribute = DynamicLibrary.open('dwmapi.dll')
    .lookupFunction<DwmGetWindowAttributeNative, DwmGetWindowAttributeDart>('DwmGetWindowAttribute');
// hwnd : HWND -> Pointer<Void>
// dwAttribute : DWORD -> Uint32
// pvAttribute : void* out -> Pointer<Void>
// cbAttribute : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DwmGetWindowAttribute(
  hwnd: THandle;   // HWND
  dwAttribute: DWORD;   // DWORD
  pvAttribute: Pointer;   // void* out
  cbAttribute: DWORD   // DWORD
): Integer; stdcall;
  external 'dwmapi.dll' name 'DwmGetWindowAttribute';

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

foreign import stdcall safe "DwmGetWindowAttribute"
  c_DwmGetWindowAttribute :: Ptr () -> Word32 -> Ptr () -> Word32 -> IO Int32
-- hwnd : HWND -> Ptr ()
-- dwAttribute : DWORD -> Word32
-- pvAttribute : void* out -> Ptr ()
-- cbAttribute : DWORD -> Word32
-- 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 dwmgetwindowattribute =
  foreign "DwmGetWindowAttribute"
    ((ptr void) @-> uint32_t @-> (ptr void) @-> uint32_t @-> returning int32_t)
(* hwnd : HWND -> (ptr void) *)
(* dwAttribute : DWORD -> uint32_t *)
(* pvAttribute : void* out -> (ptr void) *)
(* cbAttribute : DWORD -> uint32_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 ("DwmGetWindowAttribute" dwm-get-window-attribute :convention :stdcall) :int32
  (hwnd :pointer)   ; HWND
  (dw-attribute :uint32)   ; DWORD
  (pv-attribute :pointer)   ; void* out
  (cb-attribute :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $DwmGetWindowAttribute = Win32::API::More->new('dwmapi',
    'int DwmGetWindowAttribute(HANDLE hwnd, DWORD dwAttribute, LPVOID pvAttribute, DWORD cbAttribute)');
# my $ret = $DwmGetWindowAttribute->Call($hwnd, $dwAttribute, $pvAttribute, $cbAttribute);
# hwnd : HWND -> HANDLE
# dwAttribute : DWORD -> DWORD
# pvAttribute : void* out -> LPVOID
# cbAttribute : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。