GetKeyboardLayoutList

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

INT GetKeyboardLayoutList(
    INT nBuff,
    HKL* lpList   // optional
);

<DllImport("USER32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetKeyboardLayoutList(
    nBuff As Integer,   ' INT
    lpList As IntPtr   ' HKL* optional, out
) As Integer
End Function

' nBuff : INT
' lpList : HKL* optional, out
Declare PtrSafe Function GetKeyboardLayoutList Lib "user32" ( _
    ByVal nBuff As Long, _
    ByVal lpList 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

GetKeyboardLayoutList = ctypes.windll.user32.GetKeyboardLayoutList
GetKeyboardLayoutList.restype = ctypes.c_int
GetKeyboardLayoutList.argtypes = [
    ctypes.c_int,  # nBuff : INT
    ctypes.c_void_p,  # lpList : HKL* optional, out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
GetKeyboardLayoutList = Fiddle::Function.new(
  lib['GetKeyboardLayoutList'],
  [
    Fiddle::TYPE_INT,  # nBuff : INT
    Fiddle::TYPE_VOIDP,  # lpList : HKL* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn GetKeyboardLayoutList(
        nBuff: i32,  // INT
        lpList: *mut *mut core::ffi::c_void  // HKL* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", SetLastError = true)]
public static extern int GetKeyboardLayoutList(int nBuff, IntPtr lpList);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_GetKeyboardLayoutList' -Namespace Win32 -PassThru
# $api::GetKeyboardLayoutList(nBuff, lpList)

#uselib "USER32.dll"
#func global GetKeyboardLayoutList "GetKeyboardLayoutList" sptr, sptr
; GetKeyboardLayoutList nBuff, lpList   ; 戻り値は stat
; nBuff : INT -> "sptr"
; lpList : HKL* optional, 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。

#uselib "USER32.dll"
#cfunc global GetKeyboardLayoutList "GetKeyboardLayoutList" int, sptr
; res = GetKeyboardLayoutList(nBuff, lpList)
; nBuff : INT -> "int"
; lpList : HKL* optional, out -> "sptr"

; INT GetKeyboardLayoutList(INT nBuff, HKL* lpList)
#uselib "USER32.dll"
#cfunc global GetKeyboardLayoutList "GetKeyboardLayoutList" int, intptr
; res = GetKeyboardLayoutList(nBuff, lpList)
; nBuff : INT -> "int"
; lpList : HKL* optional, out -> "intptr"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procGetKeyboardLayoutList = user32.NewProc("GetKeyboardLayoutList")
)

// nBuff (INT), lpList (HKL* optional, out)
r1, _, err := procGetKeyboardLayoutList.Call(
	uintptr(nBuff),
	uintptr(lpList),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function GetKeyboardLayoutList(
  nBuff: Integer;   // INT
  lpList: Pointer   // HKL* optional, out
): Integer; stdcall;
  external 'USER32.dll' name 'GetKeyboardLayoutList';

result := DllCall("USER32\GetKeyboardLayoutList"
    , "Int", nBuff   ; INT
    , "Ptr", lpList   ; HKL* optional, out
    , "Int")   ; return: INT

●GetKeyboardLayoutList(nBuff, lpList) = DLL("USER32.dll", "int GetKeyboardLayoutList(int, void*)")
# 呼び出し: GetKeyboardLayoutList(nBuff, lpList)
# nBuff : INT -> "int"
# lpList : HKL* optional, 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 "user32" fn GetKeyboardLayoutList(
    nBuff: i32, // INT
    lpList: ?*anyopaque // HKL* optional, out
) callconv(std.os.windows.WINAPI) i32;

proc GetKeyboardLayoutList(
    nBuff: int32,  # INT
    lpList: pointer  # HKL* optional, out
): int32 {.importc: "GetKeyboardLayoutList", stdcall, dynlib: "USER32.dll".}

pragma(lib, "user32");
extern(Windows)
int GetKeyboardLayoutList(
    int nBuff,   // INT
    void* lpList   // HKL* optional, out
);

ccall((:GetKeyboardLayoutList, "USER32.dll"), stdcall, Int32,
      (Int32, Ptr{Cvoid}),
      nBuff, lpList)
# nBuff : INT -> Int32
# lpList : HKL* optional, out -> Ptr{Cvoid}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t GetKeyboardLayoutList(
    int32_t nBuff,
    void* lpList);
]]
local user32 = ffi.load("user32")
-- user32.GetKeyboardLayoutList(nBuff, lpList)
-- nBuff : INT
-- lpList : HKL* optional, 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('USER32.dll');
const GetKeyboardLayoutList = lib.func('__stdcall', 'GetKeyboardLayoutList', 'int32_t', ['int32_t', 'void *']);
// GetKeyboardLayoutList(nBuff, lpList)
// nBuff : INT -> 'int32_t'
// lpList : HKL* optional, 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("USER32.dll", {
  GetKeyboardLayoutList: { parameters: ["i32", "pointer"], result: "i32" },
});
// lib.symbols.GetKeyboardLayoutList(nBuff, lpList)
// nBuff : INT -> "i32"
// lpList : HKL* optional, 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 GetKeyboardLayoutList(
    int32_t nBuff,
    void* lpList);
C, "USER32.dll");
// $ffi->GetKeyboardLayoutList(nBuff, lpList);
// nBuff : INT
// lpList : HKL* optional, 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 User32 extends StdCallLibrary {
    User32 INSTANCE = Native.load("user32", User32.class);
    int GetKeyboardLayoutList(
        int nBuff,   // INT
        Pointer lpList   // HKL* optional, out
    );
}

@[Link("user32")]
lib LibUSER32
  fun GetKeyboardLayoutList = GetKeyboardLayoutList(
    nBuff : Int32,   # INT
    lpList : Void*   # HKL* optional, 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 GetKeyboardLayoutListNative = Int32 Function(Int32, Pointer<Void>);
typedef GetKeyboardLayoutListDart = int Function(int, Pointer<Void>);
final GetKeyboardLayoutList = DynamicLibrary.open('USER32.dll')
    .lookupFunction<GetKeyboardLayoutListNative, GetKeyboardLayoutListDart>('GetKeyboardLayoutList');
// nBuff : INT -> Int32
// lpList : HKL* optional, out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function GetKeyboardLayoutList(
  nBuff: Integer;   // INT
  lpList: Pointer   // HKL* optional, out
): Integer; stdcall;
  external 'USER32.dll' name 'GetKeyboardLayoutList';

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

foreign import stdcall safe "GetKeyboardLayoutList"
  c_GetKeyboardLayoutList :: Int32 -> Ptr () -> IO Int32
-- nBuff : INT -> Int32
-- lpList : HKL* optional, 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 getkeyboardlayoutlist =
  foreign "GetKeyboardLayoutList"
    (int32_t @-> (ptr void) @-> returning int32_t)
(* nBuff : INT -> int32_t *)
(* lpList : HKL* optional, 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 user32 (t "USER32.dll"))
(cffi:use-foreign-library user32)

(cffi:defcfun ("GetKeyboardLayoutList" get-keyboard-layout-list :convention :stdcall) :int32
  (n-buff :int32)   ; INT
  (lp-list :pointer))   ; HKL* optional, out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $GetKeyboardLayoutList = Win32::API::More->new('USER32',
    'int GetKeyboardLayoutList(int nBuff, HANDLE lpList)');
# my $ret = $GetKeyboardLayoutList->Call($nBuff, $lpList);
# nBuff : INT -> int
# lpList : HKL* optional, out -> HANDLE
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。