OpenInputDesktop

// USER32.dll
#include <windows.h>

HDESK OpenInputDesktop(
    DESKTOP_CONTROL_FLAGS dwFlags,
    BOOL fInherit,
    DESKTOP_ACCESS_FLAGS dwDesiredAccess
);

<DllImport("USER32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function OpenInputDesktop(
    dwFlags As UInteger,   ' DESKTOP_CONTROL_FLAGS
    fInherit As Boolean,   ' BOOL
    dwDesiredAccess As UInteger   ' DESKTOP_ACCESS_FLAGS
) As IntPtr
End Function

' dwFlags : DESKTOP_CONTROL_FLAGS
' fInherit : BOOL
' dwDesiredAccess : DESKTOP_ACCESS_FLAGS
Declare PtrSafe Function OpenInputDesktop Lib "user32" ( _
    ByVal dwFlags As Long, _
    ByVal fInherit As Long, _
    ByVal dwDesiredAccess As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

OpenInputDesktop = ctypes.windll.user32.OpenInputDesktop
OpenInputDesktop.restype = ctypes.c_void_p
OpenInputDesktop.argtypes = [
    wintypes.DWORD,  # dwFlags : DESKTOP_CONTROL_FLAGS
    wintypes.BOOL,  # fInherit : BOOL
    wintypes.DWORD,  # dwDesiredAccess : DESKTOP_ACCESS_FLAGS
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
OpenInputDesktop = Fiddle::Function.new(
  lib['OpenInputDesktop'],
  [
    -Fiddle::TYPE_INT,  # dwFlags : DESKTOP_CONTROL_FLAGS
    Fiddle::TYPE_INT,  # fInherit : BOOL
    -Fiddle::TYPE_INT,  # dwDesiredAccess : DESKTOP_ACCESS_FLAGS
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "user32")]
extern "system" {
    fn OpenInputDesktop(
        dwFlags: u32,  // DESKTOP_CONTROL_FLAGS
        fInherit: i32,  // BOOL
        dwDesiredAccess: u32  // DESKTOP_ACCESS_FLAGS
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", SetLastError = true)]
public static extern IntPtr OpenInputDesktop(uint dwFlags, bool fInherit, uint dwDesiredAccess);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_OpenInputDesktop' -Namespace Win32 -PassThru
# $api::OpenInputDesktop(dwFlags, fInherit, dwDesiredAccess)

#uselib "USER32.dll"
#func global OpenInputDesktop "OpenInputDesktop" sptr, sptr, sptr
; OpenInputDesktop dwFlags, fInherit, dwDesiredAccess   ; 戻り値は stat
; dwFlags : DESKTOP_CONTROL_FLAGS -> "sptr"
; fInherit : BOOL -> "sptr"
; dwDesiredAccess : DESKTOP_ACCESS_FLAGS -> "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 "USER32.dll"
#cfunc global OpenInputDesktop "OpenInputDesktop" int, int, int
; res = OpenInputDesktop(dwFlags, fInherit, dwDesiredAccess)
; dwFlags : DESKTOP_CONTROL_FLAGS -> "int"
; fInherit : BOOL -> "int"
; dwDesiredAccess : DESKTOP_ACCESS_FLAGS -> "int"

; HDESK OpenInputDesktop(DESKTOP_CONTROL_FLAGS dwFlags, BOOL fInherit, DESKTOP_ACCESS_FLAGS dwDesiredAccess)
#uselib "USER32.dll"
#cfunc global OpenInputDesktop "OpenInputDesktop" int, int, int
; res = OpenInputDesktop(dwFlags, fInherit, dwDesiredAccess)
; dwFlags : DESKTOP_CONTROL_FLAGS -> "int"
; fInherit : BOOL -> "int"
; dwDesiredAccess : DESKTOP_ACCESS_FLAGS -> "int"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procOpenInputDesktop = user32.NewProc("OpenInputDesktop")
)

// dwFlags (DESKTOP_CONTROL_FLAGS), fInherit (BOOL), dwDesiredAccess (DESKTOP_ACCESS_FLAGS)
r1, _, err := procOpenInputDesktop.Call(
	uintptr(dwFlags),
	uintptr(fInherit),
	uintptr(dwDesiredAccess),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HDESK

function OpenInputDesktop(
  dwFlags: DWORD;   // DESKTOP_CONTROL_FLAGS
  fInherit: BOOL;   // BOOL
  dwDesiredAccess: DWORD   // DESKTOP_ACCESS_FLAGS
): THandle; stdcall;
  external 'USER32.dll' name 'OpenInputDesktop';

result := DllCall("USER32\OpenInputDesktop"
    , "UInt", dwFlags   ; DESKTOP_CONTROL_FLAGS
    , "Int", fInherit   ; BOOL
    , "UInt", dwDesiredAccess   ; DESKTOP_ACCESS_FLAGS
    , "Ptr")   ; return: HDESK

●OpenInputDesktop(dwFlags, fInherit, dwDesiredAccess) = DLL("USER32.dll", "void* OpenInputDesktop(dword, bool, dword)")
# 呼び出し: OpenInputDesktop(dwFlags, fInherit, dwDesiredAccess)
# dwFlags : DESKTOP_CONTROL_FLAGS -> "dword"
# fInherit : BOOL -> "bool"
# dwDesiredAccess : DESKTOP_ACCESS_FLAGS -> "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 "user32" fn OpenInputDesktop(
    dwFlags: u32, // DESKTOP_CONTROL_FLAGS
    fInherit: i32, // BOOL
    dwDesiredAccess: u32 // DESKTOP_ACCESS_FLAGS
) callconv(std.os.windows.WINAPI) ?*anyopaque;

proc OpenInputDesktop(
    dwFlags: uint32,  # DESKTOP_CONTROL_FLAGS
    fInherit: int32,  # BOOL
    dwDesiredAccess: uint32  # DESKTOP_ACCESS_FLAGS
): pointer {.importc: "OpenInputDesktop", stdcall, dynlib: "USER32.dll".}

pragma(lib, "user32");
extern(Windows)
void* OpenInputDesktop(
    uint dwFlags,   // DESKTOP_CONTROL_FLAGS
    int fInherit,   // BOOL
    uint dwDesiredAccess   // DESKTOP_ACCESS_FLAGS
);

ccall((:OpenInputDesktop, "USER32.dll"), stdcall, Ptr{Cvoid},
      (UInt32, Int32, UInt32),
      dwFlags, fInherit, dwDesiredAccess)
# dwFlags : DESKTOP_CONTROL_FLAGS -> UInt32
# fInherit : BOOL -> Int32
# dwDesiredAccess : DESKTOP_ACCESS_FLAGS -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void* OpenInputDesktop(
    uint32_t dwFlags,
    int32_t fInherit,
    uint32_t dwDesiredAccess);
]]
local user32 = ffi.load("user32")
-- user32.OpenInputDesktop(dwFlags, fInherit, dwDesiredAccess)
-- dwFlags : DESKTOP_CONTROL_FLAGS
-- fInherit : BOOL
-- dwDesiredAccess : DESKTOP_ACCESS_FLAGS
-- 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('USER32.dll');
const OpenInputDesktop = lib.func('__stdcall', 'OpenInputDesktop', 'void *', ['uint32_t', 'int32_t', 'uint32_t']);
// OpenInputDesktop(dwFlags, fInherit, dwDesiredAccess)
// dwFlags : DESKTOP_CONTROL_FLAGS -> 'uint32_t'
// fInherit : BOOL -> 'int32_t'
// dwDesiredAccess : DESKTOP_ACCESS_FLAGS -> '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("USER32.dll", {
  OpenInputDesktop: { parameters: ["u32", "i32", "u32"], result: "pointer" },
});
// lib.symbols.OpenInputDesktop(dwFlags, fInherit, dwDesiredAccess)
// dwFlags : DESKTOP_CONTROL_FLAGS -> "u32"
// fInherit : BOOL -> "i32"
// dwDesiredAccess : DESKTOP_ACCESS_FLAGS -> "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
void* OpenInputDesktop(
    uint32_t dwFlags,
    int32_t fInherit,
    uint32_t dwDesiredAccess);
C, "USER32.dll");
// $ffi->OpenInputDesktop(dwFlags, fInherit, dwDesiredAccess);
// dwFlags : DESKTOP_CONTROL_FLAGS
// fInherit : BOOL
// dwDesiredAccess : DESKTOP_ACCESS_FLAGS
// 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 User32 extends StdCallLibrary {
    User32 INSTANCE = Native.load("user32", User32.class);
    Pointer OpenInputDesktop(
        int dwFlags,   // DESKTOP_CONTROL_FLAGS
        boolean fInherit,   // BOOL
        int dwDesiredAccess   // DESKTOP_ACCESS_FLAGS
    );
}

@[Link("user32")]
lib LibUSER32
  fun OpenInputDesktop = OpenInputDesktop(
    dwFlags : UInt32,   # DESKTOP_CONTROL_FLAGS
    fInherit : Int32,   # BOOL
    dwDesiredAccess : UInt32   # DESKTOP_ACCESS_FLAGS
  ) : Void*
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 OpenInputDesktopNative = Pointer<Void> Function(Uint32, Int32, Uint32);
typedef OpenInputDesktopDart = Pointer<Void> Function(int, int, int);
final OpenInputDesktop = DynamicLibrary.open('USER32.dll')
    .lookupFunction<OpenInputDesktopNative, OpenInputDesktopDart>('OpenInputDesktop');
// dwFlags : DESKTOP_CONTROL_FLAGS -> Uint32
// fInherit : BOOL -> Int32
// dwDesiredAccess : DESKTOP_ACCESS_FLAGS -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function OpenInputDesktop(
  dwFlags: DWORD;   // DESKTOP_CONTROL_FLAGS
  fInherit: BOOL;   // BOOL
  dwDesiredAccess: DWORD   // DESKTOP_ACCESS_FLAGS
): THandle; stdcall;
  external 'USER32.dll' name 'OpenInputDesktop';

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

foreign import stdcall safe "OpenInputDesktop"
  c_OpenInputDesktop :: Word32 -> CInt -> Word32 -> IO (Ptr ())
-- dwFlags : DESKTOP_CONTROL_FLAGS -> Word32
-- fInherit : BOOL -> CInt
-- dwDesiredAccess : DESKTOP_ACCESS_FLAGS -> 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 openinputdesktop =
  foreign "OpenInputDesktop"
    (uint32_t @-> int32_t @-> uint32_t @-> returning (ptr void))
(* dwFlags : DESKTOP_CONTROL_FLAGS -> uint32_t *)
(* fInherit : BOOL -> int32_t *)
(* dwDesiredAccess : DESKTOP_ACCESS_FLAGS -> 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 user32 (t "USER32.dll"))
(cffi:use-foreign-library user32)

(cffi:defcfun ("OpenInputDesktop" open-input-desktop :convention :stdcall) :pointer
  (dw-flags :uint32)   ; DESKTOP_CONTROL_FLAGS
  (f-inherit :int32)   ; BOOL
  (dw-desired-access :uint32))   ; DESKTOP_ACCESS_FLAGS
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $OpenInputDesktop = Win32::API::More->new('USER32',
    'HANDLE OpenInputDesktop(DWORD dwFlags, BOOL fInherit, DWORD dwDesiredAccess)');
# my $ret = $OpenInputDesktop->Call($dwFlags, $fInherit, $dwDesiredAccess);
# dwFlags : DESKTOP_CONTROL_FLAGS -> DWORD
# fInherit : BOOL -> BOOL
# dwDesiredAccess : DESKTOP_ACCESS_FLAGS -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。