OpenDesktopW

// USER32.dll  (Unicode / -W)
#include <windows.h>

HDESK OpenDesktopW(
    LPCWSTR lpszDesktop,
    DESKTOP_CONTROL_FLAGS dwFlags,
    BOOL fInherit,
    DWORD dwDesiredAccess
);

<DllImport("USER32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function OpenDesktopW(
    <MarshalAs(UnmanagedType.LPWStr)> lpszDesktop As String,   ' LPCWSTR
    dwFlags As UInteger,   ' DESKTOP_CONTROL_FLAGS
    fInherit As Boolean,   ' BOOL
    dwDesiredAccess As UInteger   ' DWORD
) As IntPtr
End Function

' lpszDesktop : LPCWSTR
' dwFlags : DESKTOP_CONTROL_FLAGS
' fInherit : BOOL
' dwDesiredAccess : DWORD
Declare PtrSafe Function OpenDesktopW Lib "user32" ( _
    ByVal lpszDesktop As LongPtr, _
    ByVal dwFlags As Long, _
    ByVal fInherit As Long, _
    ByVal dwDesiredAccess As Long) As LongPtr
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

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

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
OpenDesktopW = Fiddle::Function.new(
  lib['OpenDesktopW'],
  [
    Fiddle::TYPE_VOIDP,  # lpszDesktop : LPCWSTR
    -Fiddle::TYPE_INT,  # dwFlags : DESKTOP_CONTROL_FLAGS
    Fiddle::TYPE_INT,  # fInherit : BOOL
    -Fiddle::TYPE_INT,  # dwDesiredAccess : DWORD
  ],
  Fiddle::TYPE_VOIDP)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "user32")]
extern "system" {
    fn OpenDesktopW(
        lpszDesktop: *const u16,  // LPCWSTR
        dwFlags: u32,  // DESKTOP_CONTROL_FLAGS
        fInherit: i32,  // BOOL
        dwDesiredAccess: u32  // DWORD
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern IntPtr OpenDesktopW([MarshalAs(UnmanagedType.LPWStr)] string lpszDesktop, uint dwFlags, bool fInherit, uint dwDesiredAccess);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_OpenDesktopW' -Namespace Win32 -PassThru
# $api::OpenDesktopW(lpszDesktop, dwFlags, fInherit, dwDesiredAccess)

#uselib "USER32.dll"
#func global OpenDesktopW "OpenDesktopW" wptr, wptr, wptr, wptr
; OpenDesktopW lpszDesktop, dwFlags, fInherit, dwDesiredAccess   ; 戻り値は stat
; lpszDesktop : LPCWSTR -> "wptr"
; dwFlags : DESKTOP_CONTROL_FLAGS -> "wptr"
; fInherit : BOOL -> "wptr"
; dwDesiredAccess : DWORD -> "wptr"
; ※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 OpenDesktopW "OpenDesktopW" wstr, int, int, int
; res = OpenDesktopW(lpszDesktop, dwFlags, fInherit, dwDesiredAccess)
; lpszDesktop : LPCWSTR -> "wstr"
; dwFlags : DESKTOP_CONTROL_FLAGS -> "int"
; fInherit : BOOL -> "int"
; dwDesiredAccess : DWORD -> "int"

; HDESK OpenDesktopW(LPCWSTR lpszDesktop, DESKTOP_CONTROL_FLAGS dwFlags, BOOL fInherit, DWORD dwDesiredAccess)
#uselib "USER32.dll"
#cfunc global OpenDesktopW "OpenDesktopW" wstr, int, int, int
; res = OpenDesktopW(lpszDesktop, dwFlags, fInherit, dwDesiredAccess)
; lpszDesktop : LPCWSTR -> "wstr"
; dwFlags : DESKTOP_CONTROL_FLAGS -> "int"
; fInherit : BOOL -> "int"
; dwDesiredAccess : DWORD -> "int"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procOpenDesktopW = user32.NewProc("OpenDesktopW")
)

// lpszDesktop (LPCWSTR), dwFlags (DESKTOP_CONTROL_FLAGS), fInherit (BOOL), dwDesiredAccess (DWORD)
r1, _, err := procOpenDesktopW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszDesktop))),
	uintptr(dwFlags),
	uintptr(fInherit),
	uintptr(dwDesiredAccess),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HDESK

function OpenDesktopW(
  lpszDesktop: PWideChar;   // LPCWSTR
  dwFlags: DWORD;   // DESKTOP_CONTROL_FLAGS
  fInherit: BOOL;   // BOOL
  dwDesiredAccess: DWORD   // DWORD
): THandle; stdcall;
  external 'USER32.dll' name 'OpenDesktopW';

result := DllCall("USER32\OpenDesktopW"
    , "WStr", lpszDesktop   ; LPCWSTR
    , "UInt", dwFlags   ; DESKTOP_CONTROL_FLAGS
    , "Int", fInherit   ; BOOL
    , "UInt", dwDesiredAccess   ; DWORD
    , "Ptr")   ; return: HDESK

●OpenDesktopW(lpszDesktop, dwFlags, fInherit, dwDesiredAccess) = DLL("USER32.dll", "void* OpenDesktopW(char*, dword, bool, dword)")
# 呼び出し: OpenDesktopW(lpszDesktop, dwFlags, fInherit, dwDesiredAccess)
# lpszDesktop : LPCWSTR -> "char*"
# dwFlags : DESKTOP_CONTROL_FLAGS -> "dword"
# fInherit : BOOL -> "bool"
# dwDesiredAccess : 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。

const std = @import("std");

extern "user32" fn OpenDesktopW(
    lpszDesktop: [*c]const u16, // LPCWSTR
    dwFlags: u32, // DESKTOP_CONTROL_FLAGS
    fInherit: i32, // BOOL
    dwDesiredAccess: u32 // DWORD
) callconv(std.os.windows.WINAPI) ?*anyopaque;
// Unicode(-W): UTF-16LE のヌル終端バッファ([*c]const u16)を渡す。

proc OpenDesktopW(
    lpszDesktop: WideCString,  # LPCWSTR
    dwFlags: uint32,  # DESKTOP_CONTROL_FLAGS
    fInherit: int32,  # BOOL
    dwDesiredAccess: uint32  # DWORD
): pointer {.importc: "OpenDesktopW", stdcall, dynlib: "USER32.dll".}
# Unicode(-W): WideCString は newWideCString("...") で生成。

pragma(lib, "user32");
extern(Windows)
void* OpenDesktopW(
    const(wchar)* lpszDesktop,   // LPCWSTR
    uint dwFlags,   // DESKTOP_CONTROL_FLAGS
    int fInherit,   // BOOL
    uint dwDesiredAccess   // DWORD
);

ccall((:OpenDesktopW, "USER32.dll"), stdcall, Ptr{Cvoid},
      (Cwstring, UInt32, Int32, UInt32),
      lpszDesktop, dwFlags, fInherit, dwDesiredAccess)
# lpszDesktop : LPCWSTR -> Cwstring
# dwFlags : DESKTOP_CONTROL_FLAGS -> UInt32
# fInherit : BOOL -> Int32
# dwDesiredAccess : DWORD -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
# Unicode(-W): Cwstring には transcode(UInt16, "...") 等で UTF-16 を渡す。

local ffi = require("ffi")
ffi.cdef[[
void* OpenDesktopW(
    const uint16_t* lpszDesktop,
    uint32_t dwFlags,
    int32_t fInherit,
    uint32_t dwDesiredAccess);
]]
local user32 = ffi.load("user32")
-- user32.OpenDesktopW(lpszDesktop, dwFlags, fInherit, dwDesiredAccess)
-- lpszDesktop : LPCWSTR
-- dwFlags : DESKTOP_CONTROL_FLAGS
-- fInherit : BOOL
-- dwDesiredAccess : 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。
-- Unicode(-W): uint16_t* には UTF-16LE のバッファ(ffi.new("uint16_t[?]", ...))を渡す。

const koffi = require('koffi');
const lib = koffi.load('USER32.dll');
const OpenDesktopW = lib.func('__stdcall', 'OpenDesktopW', 'void *', ['str16', 'uint32_t', 'int32_t', 'uint32_t']);
// OpenDesktopW(lpszDesktop, dwFlags, fInherit, dwDesiredAccess)
// lpszDesktop : LPCWSTR -> 'str16'
// dwFlags : DESKTOP_CONTROL_FLAGS -> 'uint32_t'
// fInherit : BOOL -> 'int32_t'
// dwDesiredAccess : 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("USER32.dll", {
  OpenDesktopW: { parameters: ["buffer", "u32", "i32", "u32"], result: "pointer" },
});
// lib.symbols.OpenDesktopW(lpszDesktop, dwFlags, fInherit, dwDesiredAccess)
// lpszDesktop : LPCWSTR -> "buffer"
// dwFlags : DESKTOP_CONTROL_FLAGS -> "u32"
// fInherit : BOOL -> "i32"
// dwDesiredAccess : DWORD -> "u32"
// 文字列は "buffer"。Unicode(-W) は new TextEncoder() ではなく UTF-16LE のバイト列(末尾に \x00\x00)を Uint8Array で渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
void* OpenDesktopW(
    const uint16_t* lpszDesktop,
    uint32_t dwFlags,
    int32_t fInherit,
    uint32_t dwDesiredAccess);
C, "USER32.dll");
// $ffi->OpenDesktopW(lpszDesktop, dwFlags, fInherit, dwDesiredAccess);
// lpszDesktop : LPCWSTR
// dwFlags : DESKTOP_CONTROL_FLAGS
// fInherit : BOOL
// dwDesiredAccess : 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 User32 extends StdCallLibrary {
    User32 INSTANCE = Native.load("user32", User32.class, W32APIOptions.UNICODE_OPTIONS);
    Pointer OpenDesktopW(
        WString lpszDesktop,   // LPCWSTR
        int dwFlags,   // DESKTOP_CONTROL_FLAGS
        boolean fInherit,   // BOOL
        int dwDesiredAccess   // DWORD
    );
}
// Unicode(-W): WString(入力)/char[](出力)で UTF-16 をマーシャリング。

@[Link("user32")]
lib LibUSER32
  fun OpenDesktopW = OpenDesktopW(
    lpszDesktop : UInt16*,   # LPCWSTR
    dwFlags : UInt32,   # DESKTOP_CONTROL_FLAGS
    fInherit : Int32,   # BOOL
    dwDesiredAccess : UInt32   # DWORD
  ) : 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 OpenDesktopWNative = Pointer<Void> Function(Pointer<Utf16>, Uint32, Int32, Uint32);
typedef OpenDesktopWDart = Pointer<Void> Function(Pointer<Utf16>, int, int, int);
final OpenDesktopW = DynamicLibrary.open('USER32.dll')
    .lookupFunction<OpenDesktopWNative, OpenDesktopWDart>('OpenDesktopW');
// lpszDesktop : LPCWSTR -> Pointer<Utf16>
// dwFlags : DESKTOP_CONTROL_FLAGS -> Uint32
// fInherit : BOOL -> Int32
// dwDesiredAccess : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

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

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

foreign import stdcall safe "OpenDesktopW"
  c_OpenDesktopW :: CWString -> Word32 -> CInt -> Word32 -> IO (Ptr ())
-- lpszDesktop : LPCWSTR -> CWString
-- dwFlags : DESKTOP_CONTROL_FLAGS -> Word32
-- fInherit : BOOL -> CInt
-- dwDesiredAccess : 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 opendesktopw =
  foreign "OpenDesktopW"
    ((ptr uint16_t) @-> uint32_t @-> int32_t @-> uint32_t @-> returning (ptr void))
(* lpszDesktop : LPCWSTR -> (ptr uint16_t) *)
(* dwFlags : DESKTOP_CONTROL_FLAGS -> uint32_t *)
(* fInherit : BOOL -> int32_t *)
(* dwDesiredAccess : 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 user32 (t "USER32.dll"))
(cffi:use-foreign-library user32)

(cffi:defcfun ("OpenDesktopW" open-desktop-w :convention :stdcall) :pointer
  (lpsz-desktop (:string :encoding :utf-16le))   ; LPCWSTR
  (dw-flags :uint32)   ; DESKTOP_CONTROL_FLAGS
  (f-inherit :int32)   ; BOOL
  (dw-desired-access :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $OpenDesktopW = Win32::API::More->new('USER32',
    'HANDLE OpenDesktopW(LPCWSTR lpszDesktop, DWORD dwFlags, BOOL fInherit, DWORD dwDesiredAccess)');
# my $ret = $OpenDesktopW->Call($lpszDesktop, $dwFlags, $fInherit, $dwDesiredAccess);
# lpszDesktop : LPCWSTR -> LPCWSTR
# dwFlags : DESKTOP_CONTROL_FLAGS -> DWORD
# fInherit : BOOL -> BOOL
# dwDesiredAccess : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。
# Unicode(-W): LPCWSTR/LPWSTR は Win32::API が UTF-16 変換を行う。