DwmGetGraphicsStreamClient

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

HRESULT DwmGetGraphicsStreamClient(
    DWORD uIndex,
    GUID* pClientUuid
);

<DllImport("dwmapi.dll", ExactSpelling:=True)>
Public Shared Function DwmGetGraphicsStreamClient(
    uIndex As UInteger,   ' DWORD
    <Out> ByRef pClientUuid As Guid   ' GUID* out
) As Integer
End Function

' uIndex : DWORD
' pClientUuid : GUID* out
Declare PtrSafe Function DwmGetGraphicsStreamClient Lib "dwmapi" ( _
    ByVal uIndex As Long, _
    ByVal pClientUuid As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

DwmGetGraphicsStreamClient = ctypes.windll.dwmapi.DwmGetGraphicsStreamClient
DwmGetGraphicsStreamClient.restype = ctypes.c_int
DwmGetGraphicsStreamClient.argtypes = [
    wintypes.DWORD,  # uIndex : DWORD
    ctypes.c_void_p,  # pClientUuid : GUID* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dwmapi.dll')
DwmGetGraphicsStreamClient = Fiddle::Function.new(
  lib['DwmGetGraphicsStreamClient'],
  [
    -Fiddle::TYPE_INT,  # uIndex : DWORD
    Fiddle::TYPE_VOIDP,  # pClientUuid : GUID* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "dwmapi")]
extern "system" {
    fn DwmGetGraphicsStreamClient(
        uIndex: u32,  // DWORD
        pClientUuid: *mut GUID  // GUID* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dwmapi.dll")]
public static extern int DwmGetGraphicsStreamClient(uint uIndex, out Guid pClientUuid);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dwmapi_DwmGetGraphicsStreamClient' -Namespace Win32 -PassThru
# $api::DwmGetGraphicsStreamClient(uIndex, pClientUuid)

#uselib "dwmapi.dll"
#func global DwmGetGraphicsStreamClient "DwmGetGraphicsStreamClient" sptr, sptr
; DwmGetGraphicsStreamClient uIndex, varptr(pClientUuid)   ; 戻り値は stat
; uIndex : DWORD -> "sptr"
; pClientUuid : GUID* 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")
	procDwmGetGraphicsStreamClient = dwmapi.NewProc("DwmGetGraphicsStreamClient")
)

// uIndex (DWORD), pClientUuid (GUID* out)
r1, _, err := procDwmGetGraphicsStreamClient.Call(
	uintptr(uIndex),
	uintptr(pClientUuid),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function DwmGetGraphicsStreamClient(
  uIndex: DWORD;   // DWORD
  pClientUuid: PGUID   // GUID* out
): Integer; stdcall;
  external 'dwmapi.dll' name 'DwmGetGraphicsStreamClient';

result := DllCall("dwmapi\DwmGetGraphicsStreamClient"
    , "UInt", uIndex   ; DWORD
    , "Ptr", pClientUuid   ; GUID* out
    , "Int")   ; return: HRESULT

●DwmGetGraphicsStreamClient(uIndex, pClientUuid) = DLL("dwmapi.dll", "int DwmGetGraphicsStreamClient(dword, void*)")
# 呼び出し: DwmGetGraphicsStreamClient(uIndex, pClientUuid)
# uIndex : DWORD -> "dword"
# pClientUuid : GUID* 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 DwmGetGraphicsStreamClient(
    uIndex: u32, // DWORD
    pClientUuid: [*c]GUID // GUID* out
) callconv(std.os.windows.WINAPI) i32;

proc DwmGetGraphicsStreamClient(
    uIndex: uint32,  # DWORD
    pClientUuid: ptr GUID  # GUID* out
): int32 {.importc: "DwmGetGraphicsStreamClient", stdcall, dynlib: "dwmapi.dll".}

pragma(lib, "dwmapi");
extern(Windows)
int DwmGetGraphicsStreamClient(
    uint uIndex,   // DWORD
    GUID* pClientUuid   // GUID* out
);

ccall((:DwmGetGraphicsStreamClient, "dwmapi.dll"), stdcall, Int32,
      (UInt32, Ptr{GUID}),
      uIndex, pClientUuid)
# uIndex : DWORD -> UInt32
# pClientUuid : GUID* out -> Ptr{GUID}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t DwmGetGraphicsStreamClient(
    uint32_t uIndex,
    void* pClientUuid);
]]
local dwmapi = ffi.load("dwmapi")
-- dwmapi.DwmGetGraphicsStreamClient(uIndex, pClientUuid)
-- uIndex : DWORD
-- pClientUuid : GUID* 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 DwmGetGraphicsStreamClient = lib.func('__stdcall', 'DwmGetGraphicsStreamClient', 'int32_t', ['uint32_t', 'void *']);
// DwmGetGraphicsStreamClient(uIndex, pClientUuid)
// uIndex : DWORD -> 'uint32_t'
// pClientUuid : GUID* out -> 'void *'
// 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", {
  DwmGetGraphicsStreamClient: { parameters: ["u32", "pointer"], result: "i32" },
});
// lib.symbols.DwmGetGraphicsStreamClient(uIndex, pClientUuid)
// uIndex : DWORD -> "u32"
// pClientUuid : GUID* 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 DwmGetGraphicsStreamClient(
    uint32_t uIndex,
    void* pClientUuid);
C, "dwmapi.dll");
// $ffi->DwmGetGraphicsStreamClient(uIndex, pClientUuid);
// uIndex : DWORD
// pClientUuid : GUID* 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 DwmGetGraphicsStreamClient(
        int uIndex,   // DWORD
        Pointer pClientUuid   // GUID* out
    );
}

@[Link("dwmapi")]
lib Libdwmapi
  fun DwmGetGraphicsStreamClient = DwmGetGraphicsStreamClient(
    uIndex : UInt32,   # DWORD
    pClientUuid : GUID*   # GUID* 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 DwmGetGraphicsStreamClientNative = Int32 Function(Uint32, Pointer<Void>);
typedef DwmGetGraphicsStreamClientDart = int Function(int, Pointer<Void>);
final DwmGetGraphicsStreamClient = DynamicLibrary.open('dwmapi.dll')
    .lookupFunction<DwmGetGraphicsStreamClientNative, DwmGetGraphicsStreamClientDart>('DwmGetGraphicsStreamClient');
// uIndex : DWORD -> Uint32
// pClientUuid : GUID* out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DwmGetGraphicsStreamClient(
  uIndex: DWORD;   // DWORD
  pClientUuid: PGUID   // GUID* out
): Integer; stdcall;
  external 'dwmapi.dll' name 'DwmGetGraphicsStreamClient';

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

foreign import stdcall safe "DwmGetGraphicsStreamClient"
  c_DwmGetGraphicsStreamClient :: Word32 -> Ptr () -> IO Int32
-- uIndex : DWORD -> Word32
-- pClientUuid : GUID* out -> Ptr ()
-- 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 dwmgetgraphicsstreamclient =
  foreign "DwmGetGraphicsStreamClient"
    (uint32_t @-> (ptr void) @-> returning int32_t)
(* uIndex : DWORD -> uint32_t *)
(* pClientUuid : GUID* out -> (ptr void) *)
(* 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 ("DwmGetGraphicsStreamClient" dwm-get-graphics-stream-client :convention :stdcall) :int32
  (u-index :uint32)   ; DWORD
  (p-client-uuid :pointer))   ; GUID* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

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