WTSEnumerateServersW

// WTSAPI32.dll  (Unicode / -W)
#include <windows.h>

BOOL WTSEnumerateServersW(
    LPWSTR pDomainName,
    DWORD Reserved,
    DWORD Version,
    WTS_SERVER_INFOW** ppServerInfo,
    DWORD* pCount
);

<DllImport("WTSAPI32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WTSEnumerateServersW(
    <MarshalAs(UnmanagedType.LPWStr)> pDomainName As String,   ' LPWSTR
    Reserved As UInteger,   ' DWORD
    Version As UInteger,   ' DWORD
    ppServerInfo As IntPtr,   ' WTS_SERVER_INFOW** out
    <Out> ByRef pCount As UInteger   ' DWORD* out
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' pDomainName : LPWSTR
' Reserved : DWORD
' Version : DWORD
' ppServerInfo : WTS_SERVER_INFOW** out
' pCount : DWORD* out
Declare PtrSafe Function WTSEnumerateServersW Lib "wtsapi32" ( _
    ByVal pDomainName As LongPtr, _
    ByVal Reserved As Long, _
    ByVal Version As Long, _
    ByVal ppServerInfo As LongPtr, _
    ByRef pCount As Long) As Long
' 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

WTSEnumerateServersW = ctypes.windll.wtsapi32.WTSEnumerateServersW
WTSEnumerateServersW.restype = wintypes.BOOL
WTSEnumerateServersW.argtypes = [
    wintypes.LPCWSTR,  # pDomainName : LPWSTR
    wintypes.DWORD,  # Reserved : DWORD
    wintypes.DWORD,  # Version : DWORD
    ctypes.c_void_p,  # ppServerInfo : WTS_SERVER_INFOW** out
    ctypes.POINTER(wintypes.DWORD),  # pCount : DWORD* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WTSAPI32.dll')
WTSEnumerateServersW = Fiddle::Function.new(
  lib['WTSEnumerateServersW'],
  [
    Fiddle::TYPE_VOIDP,  # pDomainName : LPWSTR
    -Fiddle::TYPE_INT,  # Reserved : DWORD
    -Fiddle::TYPE_INT,  # Version : DWORD
    Fiddle::TYPE_VOIDP,  # ppServerInfo : WTS_SERVER_INFOW** out
    Fiddle::TYPE_VOIDP,  # pCount : DWORD* out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "wtsapi32")]
extern "system" {
    fn WTSEnumerateServersW(
        pDomainName: *mut u16,  // LPWSTR
        Reserved: u32,  // DWORD
        Version: u32,  // DWORD
        ppServerInfo: *mut *mut WTS_SERVER_INFOW,  // WTS_SERVER_INFOW** out
        pCount: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WTSAPI32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool WTSEnumerateServersW([MarshalAs(UnmanagedType.LPWStr)] string pDomainName, uint Reserved, uint Version, IntPtr ppServerInfo, out uint pCount);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WTSAPI32_WTSEnumerateServersW' -Namespace Win32 -PassThru
# $api::WTSEnumerateServersW(pDomainName, Reserved, Version, ppServerInfo, pCount)

#uselib "WTSAPI32.dll"
#func global WTSEnumerateServersW "WTSEnumerateServersW" wptr, wptr, wptr, wptr, wptr
; WTSEnumerateServersW pDomainName, Reserved, Version, varptr(ppServerInfo), varptr(pCount)   ; 戻り値は stat
; pDomainName : LPWSTR -> "wptr"
; Reserved : DWORD -> "wptr"
; Version : DWORD -> "wptr"
; ppServerInfo : WTS_SERVER_INFOW** out -> "wptr"
; pCount : DWORD* out -> "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。

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

var (
	wtsapi32 = windows.NewLazySystemDLL("WTSAPI32.dll")
	procWTSEnumerateServersW = wtsapi32.NewProc("WTSEnumerateServersW")
)

// pDomainName (LPWSTR), Reserved (DWORD), Version (DWORD), ppServerInfo (WTS_SERVER_INFOW** out), pCount (DWORD* out)
r1, _, err := procWTSEnumerateServersW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pDomainName))),
	uintptr(Reserved),
	uintptr(Version),
	uintptr(ppServerInfo),
	uintptr(pCount),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function WTSEnumerateServersW(
  pDomainName: PWideChar;   // LPWSTR
  Reserved: DWORD;   // DWORD
  Version: DWORD;   // DWORD
  ppServerInfo: Pointer;   // WTS_SERVER_INFOW** out
  pCount: Pointer   // DWORD* out
): BOOL; stdcall;
  external 'WTSAPI32.dll' name 'WTSEnumerateServersW';

result := DllCall("WTSAPI32\WTSEnumerateServersW"
    , "WStr", pDomainName   ; LPWSTR
    , "UInt", Reserved   ; DWORD
    , "UInt", Version   ; DWORD
    , "Ptr", ppServerInfo   ; WTS_SERVER_INFOW** out
    , "Ptr", pCount   ; DWORD* out
    , "Int")   ; return: BOOL

●WTSEnumerateServersW(pDomainName, Reserved, Version, ppServerInfo, pCount) = DLL("WTSAPI32.dll", "bool WTSEnumerateServersW(char*, dword, dword, void*, void*)")
# 呼び出し: WTSEnumerateServersW(pDomainName, Reserved, Version, ppServerInfo, pCount)
# pDomainName : LPWSTR -> "char*"
# Reserved : DWORD -> "dword"
# Version : DWORD -> "dword"
# ppServerInfo : WTS_SERVER_INFOW** out -> "void*"
# pCount : DWORD* 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)。
# ※-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 "wtsapi32" fn WTSEnumerateServersW(
    pDomainName: [*c]const u16, // LPWSTR
    Reserved: u32, // DWORD
    Version: u32, // DWORD
    ppServerInfo: [*c][*c]WTS_SERVER_INFOW, // WTS_SERVER_INFOW** out
    pCount: [*c]u32 // DWORD* out
) callconv(std.os.windows.WINAPI) i32;
// Unicode(-W): UTF-16LE のヌル終端バッファ([*c]const u16)を渡す。

proc WTSEnumerateServersW(
    pDomainName: WideCString,  # LPWSTR
    Reserved: uint32,  # DWORD
    Version: uint32,  # DWORD
    ppServerInfo: ptr WTS_SERVER_INFOW,  # WTS_SERVER_INFOW** out
    pCount: ptr uint32  # DWORD* out
): int32 {.importc: "WTSEnumerateServersW", stdcall, dynlib: "WTSAPI32.dll".}
# Unicode(-W): WideCString は newWideCString("...") で生成。

pragma(lib, "wtsapi32");
extern(Windows)
int WTSEnumerateServersW(
    const(wchar)* pDomainName,   // LPWSTR
    uint Reserved,   // DWORD
    uint Version,   // DWORD
    WTS_SERVER_INFOW** ppServerInfo,   // WTS_SERVER_INFOW** out
    uint* pCount   // DWORD* out
);

ccall((:WTSEnumerateServersW, "WTSAPI32.dll"), stdcall, Int32,
      (Cwstring, UInt32, UInt32, Ptr{WTS_SERVER_INFOW}, Ptr{UInt32}),
      pDomainName, Reserved, Version, ppServerInfo, pCount)
# pDomainName : LPWSTR -> Cwstring
# Reserved : DWORD -> UInt32
# Version : DWORD -> UInt32
# ppServerInfo : WTS_SERVER_INFOW** out -> Ptr{WTS_SERVER_INFOW}
# pCount : DWORD* out -> Ptr{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[[
int32_t WTSEnumerateServersW(
    const uint16_t* pDomainName,
    uint32_t Reserved,
    uint32_t Version,
    void* ppServerInfo,
    uint32_t* pCount);
]]
local wtsapi32 = ffi.load("wtsapi32")
-- wtsapi32.WTSEnumerateServersW(pDomainName, Reserved, Version, ppServerInfo, pCount)
-- pDomainName : LPWSTR
-- Reserved : DWORD
-- Version : DWORD
-- ppServerInfo : WTS_SERVER_INFOW** out
-- pCount : DWORD* 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。
-- 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('WTSAPI32.dll');
const WTSEnumerateServersW = lib.func('__stdcall', 'WTSEnumerateServersW', 'int32_t', ['str16', 'uint32_t', 'uint32_t', 'void *', 'uint32_t *']);
// WTSEnumerateServersW(pDomainName, Reserved, Version, ppServerInfo, pCount)
// pDomainName : LPWSTR -> 'str16'
// Reserved : DWORD -> 'uint32_t'
// Version : DWORD -> 'uint32_t'
// ppServerInfo : WTS_SERVER_INFOW** out -> 'void *'
// pCount : DWORD* out -> '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("WTSAPI32.dll", {
  WTSEnumerateServersW: { parameters: ["buffer", "u32", "u32", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.WTSEnumerateServersW(pDomainName, Reserved, Version, ppServerInfo, pCount)
// pDomainName : LPWSTR -> "buffer"
// Reserved : DWORD -> "u32"
// Version : DWORD -> "u32"
// ppServerInfo : WTS_SERVER_INFOW** out -> "pointer"
// pCount : DWORD* out -> "pointer"
// 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
int32_t WTSEnumerateServersW(
    const uint16_t* pDomainName,
    uint32_t Reserved,
    uint32_t Version,
    void* ppServerInfo,
    uint32_t* pCount);
C, "WTSAPI32.dll");
// $ffi->WTSEnumerateServersW(pDomainName, Reserved, Version, ppServerInfo, pCount);
// pDomainName : LPWSTR
// Reserved : DWORD
// Version : DWORD
// ppServerInfo : WTS_SERVER_INFOW** out
// pCount : DWORD* 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 Wtsapi32 extends StdCallLibrary {
    Wtsapi32 INSTANCE = Native.load("wtsapi32", Wtsapi32.class, W32APIOptions.UNICODE_OPTIONS);
    boolean WTSEnumerateServersW(
        WString pDomainName,   // LPWSTR
        int Reserved,   // DWORD
        int Version,   // DWORD
        Pointer ppServerInfo,   // WTS_SERVER_INFOW** out
        IntByReference pCount   // DWORD* out
    );
}
// Unicode(-W): WString(入力)/char[](出力)で UTF-16 をマーシャリング。

@[Link("wtsapi32")]
lib LibWTSAPI32
  fun WTSEnumerateServersW = WTSEnumerateServersW(
    pDomainName : UInt16*,   # LPWSTR
    Reserved : UInt32,   # DWORD
    Version : UInt32,   # DWORD
    ppServerInfo : WTS_SERVER_INFOW**,   # WTS_SERVER_INFOW** out
    pCount : UInt32*   # DWORD* 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 WTSEnumerateServersWNative = Int32 Function(Pointer<Utf16>, Uint32, Uint32, Pointer<Void>, Pointer<Uint32>);
typedef WTSEnumerateServersWDart = int Function(Pointer<Utf16>, int, int, Pointer<Void>, Pointer<Uint32>);
final WTSEnumerateServersW = DynamicLibrary.open('WTSAPI32.dll')
    .lookupFunction<WTSEnumerateServersWNative, WTSEnumerateServersWDart>('WTSEnumerateServersW');
// pDomainName : LPWSTR -> Pointer<Utf16>
// Reserved : DWORD -> Uint32
// Version : DWORD -> Uint32
// ppServerInfo : WTS_SERVER_INFOW** out -> Pointer<Void>
// pCount : DWORD* out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function WTSEnumerateServersW(
  pDomainName: PWideChar;   // LPWSTR
  Reserved: DWORD;   // DWORD
  Version: DWORD;   // DWORD
  ppServerInfo: Pointer;   // WTS_SERVER_INFOW** out
  pCount: Pointer   // DWORD* out
): BOOL; stdcall;
  external 'WTSAPI32.dll' name 'WTSEnumerateServersW';

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

foreign import stdcall safe "WTSEnumerateServersW"
  c_WTSEnumerateServersW :: CWString -> Word32 -> Word32 -> Ptr () -> Ptr Word32 -> IO CInt
-- pDomainName : LPWSTR -> CWString
-- Reserved : DWORD -> Word32
-- Version : DWORD -> Word32
-- ppServerInfo : WTS_SERVER_INFOW** out -> Ptr ()
-- pCount : DWORD* out -> Ptr 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 wtsenumerateserversw =
  foreign "WTSEnumerateServersW"
    ((ptr uint16_t) @-> uint32_t @-> uint32_t @-> (ptr void) @-> (ptr uint32_t) @-> returning int32_t)
(* pDomainName : LPWSTR -> (ptr uint16_t) *)
(* Reserved : DWORD -> uint32_t *)
(* Version : DWORD -> uint32_t *)
(* ppServerInfo : WTS_SERVER_INFOW** out -> (ptr void) *)
(* pCount : DWORD* out -> (ptr 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 wtsapi32 (t "WTSAPI32.dll"))
(cffi:use-foreign-library wtsapi32)

(cffi:defcfun ("WTSEnumerateServersW" wtsenumerate-servers-w :convention :stdcall) :int32
  (p-domain-name (:string :encoding :utf-16le))   ; LPWSTR
  (reserved :uint32)   ; DWORD
  (version :uint32)   ; DWORD
  (pp-server-info :pointer)   ; WTS_SERVER_INFOW** out
  (p-count :pointer))   ; DWORD* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $WTSEnumerateServersW = Win32::API::More->new('WTSAPI32',
    'BOOL WTSEnumerateServersW(LPCWSTR pDomainName, DWORD Reserved, DWORD Version, LPVOID ppServerInfo, LPVOID pCount)');
# my $ret = $WTSEnumerateServersW->Call($pDomainName, $Reserved, $Version, $ppServerInfo, $pCount);
# pDomainName : LPWSTR -> LPCWSTR
# Reserved : DWORD -> DWORD
# Version : DWORD -> DWORD
# ppServerInfo : WTS_SERVER_INFOW** out -> LPVOID
# pCount : DWORD* out -> LPVOID
# 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。