MessageBoxExA

// USER32.dll  (ANSI / -A)
#include <windows.h>

MESSAGEBOX_RESULT MessageBoxExA(
    HWND hWnd,   // optional
    LPCSTR lpText,   // optional
    LPCSTR lpCaption,   // optional
    MESSAGEBOX_STYLE uType,
    WORD wLanguageId
);

<DllImport("USER32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function MessageBoxExA(
    hWnd As IntPtr,   ' HWND optional
    <MarshalAs(UnmanagedType.LPStr)> lpText As String,   ' LPCSTR optional
    <MarshalAs(UnmanagedType.LPStr)> lpCaption As String,   ' LPCSTR optional
    uType As UInteger,   ' MESSAGEBOX_STYLE
    wLanguageId As UShort   ' WORD
) As Integer
End Function

' hWnd : HWND optional
' lpText : LPCSTR optional
' lpCaption : LPCSTR optional
' uType : MESSAGEBOX_STYLE
' wLanguageId : WORD
Declare PtrSafe Function MessageBoxExA Lib "user32" ( _
    ByVal hWnd As LongPtr, _
    ByVal lpText As String, _
    ByVal lpCaption As String, _
    ByVal uType As Long, _
    ByVal wLanguageId As Integer) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

MessageBoxExA = ctypes.windll.user32.MessageBoxExA
MessageBoxExA.restype = ctypes.c_int
MessageBoxExA.argtypes = [
    wintypes.HANDLE,  # hWnd : HWND optional
    wintypes.LPCSTR,  # lpText : LPCSTR optional
    wintypes.LPCSTR,  # lpCaption : LPCSTR optional
    wintypes.DWORD,  # uType : MESSAGEBOX_STYLE
    ctypes.c_ushort,  # wLanguageId : WORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
MessageBoxExA = Fiddle::Function.new(
  lib['MessageBoxExA'],
  [
    Fiddle::TYPE_VOIDP,  # hWnd : HWND optional
    Fiddle::TYPE_VOIDP,  # lpText : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # lpCaption : LPCSTR optional
    -Fiddle::TYPE_INT,  # uType : MESSAGEBOX_STYLE
    -Fiddle::TYPE_SHORT,  # wLanguageId : WORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn MessageBoxExA(
        hWnd: *mut core::ffi::c_void,  // HWND optional
        lpText: *const u8,  // LPCSTR optional
        lpCaption: *const u8,  // LPCSTR optional
        uType: u32,  // MESSAGEBOX_STYLE
        wLanguageId: u16  // WORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern int MessageBoxExA(IntPtr hWnd, [MarshalAs(UnmanagedType.LPStr)] string lpText, [MarshalAs(UnmanagedType.LPStr)] string lpCaption, uint uType, ushort wLanguageId);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_MessageBoxExA' -Namespace Win32 -PassThru
# $api::MessageBoxExA(hWnd, lpText, lpCaption, uType, wLanguageId)

#uselib "USER32.dll"
#func global MessageBoxExA "MessageBoxExA" sptr, sptr, sptr, sptr, sptr
; MessageBoxExA hWnd, lpText, lpCaption, uType, wLanguageId   ; 戻り値は stat
; hWnd : HWND optional -> "sptr"
; lpText : LPCSTR optional -> "sptr"
; lpCaption : LPCSTR optional -> "sptr"
; uType : MESSAGEBOX_STYLE -> "sptr"
; wLanguageId : WORD -> "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 MessageBoxExA "MessageBoxExA" sptr, str, str, int, int
; res = MessageBoxExA(hWnd, lpText, lpCaption, uType, wLanguageId)
; hWnd : HWND optional -> "sptr"
; lpText : LPCSTR optional -> "str"
; lpCaption : LPCSTR optional -> "str"
; uType : MESSAGEBOX_STYLE -> "int"
; wLanguageId : WORD -> "int"

; MESSAGEBOX_RESULT MessageBoxExA(HWND hWnd, LPCSTR lpText, LPCSTR lpCaption, MESSAGEBOX_STYLE uType, WORD wLanguageId)
#uselib "USER32.dll"
#cfunc global MessageBoxExA "MessageBoxExA" intptr, str, str, int, int
; res = MessageBoxExA(hWnd, lpText, lpCaption, uType, wLanguageId)
; hWnd : HWND optional -> "intptr"
; lpText : LPCSTR optional -> "str"
; lpCaption : LPCSTR optional -> "str"
; uType : MESSAGEBOX_STYLE -> "int"
; wLanguageId : WORD -> "int"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procMessageBoxExA = user32.NewProc("MessageBoxExA")
)

// hWnd (HWND optional), lpText (LPCSTR optional), lpCaption (LPCSTR optional), uType (MESSAGEBOX_STYLE), wLanguageId (WORD)
r1, _, err := procMessageBoxExA.Call(
	uintptr(hWnd),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpText))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpCaption))),
	uintptr(uType),
	uintptr(wLanguageId),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // MESSAGEBOX_RESULT

function MessageBoxExA(
  hWnd: THandle;   // HWND optional
  lpText: PAnsiChar;   // LPCSTR optional
  lpCaption: PAnsiChar;   // LPCSTR optional
  uType: DWORD;   // MESSAGEBOX_STYLE
  wLanguageId: Word   // WORD
): Integer; stdcall;
  external 'USER32.dll' name 'MessageBoxExA';

result := DllCall("USER32\MessageBoxExA"
    , "Ptr", hWnd   ; HWND optional
    , "AStr", lpText   ; LPCSTR optional
    , "AStr", lpCaption   ; LPCSTR optional
    , "UInt", uType   ; MESSAGEBOX_STYLE
    , "UShort", wLanguageId   ; WORD
    , "Int")   ; return: MESSAGEBOX_RESULT

●MessageBoxExA(hWnd, lpText, lpCaption, uType, wLanguageId) = DLL("USER32.dll", "int MessageBoxExA(void*, char*, char*, dword, int)")
# 呼び出し: MessageBoxExA(hWnd, lpText, lpCaption, uType, wLanguageId)
# hWnd : HWND optional -> "void*"
# lpText : LPCSTR optional -> "char*"
# lpCaption : LPCSTR optional -> "char*"
# uType : MESSAGEBOX_STYLE -> "dword"
# wLanguageId : WORD -> "int"
# 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 MessageBoxExA(
    hWnd: ?*anyopaque, // HWND optional
    lpText: [*c]const u8, // LPCSTR optional
    lpCaption: [*c]const u8, // LPCSTR optional
    uType: u32, // MESSAGEBOX_STYLE
    wLanguageId: u16 // WORD
) callconv(std.os.windows.WINAPI) i32;

proc MessageBoxExA(
    hWnd: pointer,  # HWND optional
    lpText: cstring,  # LPCSTR optional
    lpCaption: cstring,  # LPCSTR optional
    uType: uint32,  # MESSAGEBOX_STYLE
    wLanguageId: uint16  # WORD
): int32 {.importc: "MessageBoxExA", stdcall, dynlib: "USER32.dll".}

pragma(lib, "user32");
extern(Windows)
int MessageBoxExA(
    void* hWnd,   // HWND optional
    const(char)* lpText,   // LPCSTR optional
    const(char)* lpCaption,   // LPCSTR optional
    uint uType,   // MESSAGEBOX_STYLE
    ushort wLanguageId   // WORD
);

ccall((:MessageBoxExA, "USER32.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Cstring, Cstring, UInt32, UInt16),
      hWnd, lpText, lpCaption, uType, wLanguageId)
# hWnd : HWND optional -> Ptr{Cvoid}
# lpText : LPCSTR optional -> Cstring
# lpCaption : LPCSTR optional -> Cstring
# uType : MESSAGEBOX_STYLE -> UInt32
# wLanguageId : WORD -> UInt16
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t MessageBoxExA(
    void* hWnd,
    const char* lpText,
    const char* lpCaption,
    uint32_t uType,
    uint16_t wLanguageId);
]]
local user32 = ffi.load("user32")
-- user32.MessageBoxExA(hWnd, lpText, lpCaption, uType, wLanguageId)
-- hWnd : HWND optional
-- lpText : LPCSTR optional
-- lpCaption : LPCSTR optional
-- uType : MESSAGEBOX_STYLE
-- wLanguageId : WORD
-- 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 MessageBoxExA = lib.func('__stdcall', 'MessageBoxExA', 'int32_t', ['void *', 'str', 'str', 'uint32_t', 'uint16_t']);
// MessageBoxExA(hWnd, lpText, lpCaption, uType, wLanguageId)
// hWnd : HWND optional -> 'void *'
// lpText : LPCSTR optional -> 'str'
// lpCaption : LPCSTR optional -> 'str'
// uType : MESSAGEBOX_STYLE -> 'uint32_t'
// wLanguageId : WORD -> 'uint16_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", {
  MessageBoxExA: { parameters: ["pointer", "buffer", "buffer", "u32", "u16"], result: "i32" },
});
// lib.symbols.MessageBoxExA(hWnd, lpText, lpCaption, uType, wLanguageId)
// hWnd : HWND optional -> "pointer"
// lpText : LPCSTR optional -> "buffer"
// lpCaption : LPCSTR optional -> "buffer"
// uType : MESSAGEBOX_STYLE -> "u32"
// wLanguageId : WORD -> "u16"
// 文字列は "buffer"。ANSI(-A) は new TextEncoder() で UTF-8/ANSI バイト列(末尾に \x00)を渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t MessageBoxExA(
    void* hWnd,
    const char* lpText,
    const char* lpCaption,
    uint32_t uType,
    uint16_t wLanguageId);
C, "USER32.dll");
// $ffi->MessageBoxExA(hWnd, lpText, lpCaption, uType, wLanguageId);
// hWnd : HWND optional
// lpText : LPCSTR optional
// lpCaption : LPCSTR optional
// uType : MESSAGEBOX_STYLE
// wLanguageId : WORD
// 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.ASCII_OPTIONS);
    int MessageBoxExA(
        Pointer hWnd,   // HWND optional
        String lpText,   // LPCSTR optional
        String lpCaption,   // LPCSTR optional
        int uType,   // MESSAGEBOX_STYLE
        short wLanguageId   // WORD
    );
}

@[Link("user32")]
lib LibUSER32
  fun MessageBoxExA = MessageBoxExA(
    hWnd : Void*,   # HWND optional
    lpText : UInt8*,   # LPCSTR optional
    lpCaption : UInt8*,   # LPCSTR optional
    uType : UInt32,   # MESSAGEBOX_STYLE
    wLanguageId : UInt16   # WORD
  ) : 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 MessageBoxExANative = Int32 Function(Pointer<Void>, Pointer<Utf8>, Pointer<Utf8>, Uint32, Uint16);
typedef MessageBoxExADart = int Function(Pointer<Void>, Pointer<Utf8>, Pointer<Utf8>, int, int);
final MessageBoxExA = DynamicLibrary.open('USER32.dll')
    .lookupFunction<MessageBoxExANative, MessageBoxExADart>('MessageBoxExA');
// hWnd : HWND optional -> Pointer<Void>
// lpText : LPCSTR optional -> Pointer<Utf8>
// lpCaption : LPCSTR optional -> Pointer<Utf8>
// uType : MESSAGEBOX_STYLE -> Uint32
// wLanguageId : WORD -> Uint16
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function MessageBoxExA(
  hWnd: THandle;   // HWND optional
  lpText: PAnsiChar;   // LPCSTR optional
  lpCaption: PAnsiChar;   // LPCSTR optional
  uType: DWORD;   // MESSAGEBOX_STYLE
  wLanguageId: Word   // WORD
): Integer; stdcall;
  external 'USER32.dll' name 'MessageBoxExA';

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

foreign import stdcall safe "MessageBoxExA"
  c_MessageBoxExA :: Ptr () -> CString -> CString -> Word32 -> Word16 -> IO Int32
-- hWnd : HWND optional -> Ptr ()
-- lpText : LPCSTR optional -> CString
-- lpCaption : LPCSTR optional -> CString
-- uType : MESSAGEBOX_STYLE -> Word32
-- wLanguageId : WORD -> Word16
-- 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 messageboxexa =
  foreign "MessageBoxExA"
    ((ptr void) @-> string @-> string @-> uint32_t @-> uint16_t @-> returning int32_t)
(* hWnd : HWND optional -> (ptr void) *)
(* lpText : LPCSTR optional -> string *)
(* lpCaption : LPCSTR optional -> string *)
(* uType : MESSAGEBOX_STYLE -> uint32_t *)
(* wLanguageId : WORD -> uint16_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 ("MessageBoxExA" message-box-ex-a :convention :stdcall) :int32
  (h-wnd :pointer)   ; HWND optional
  (lp-text :string)   ; LPCSTR optional
  (lp-caption :string)   ; LPCSTR optional
  (u-type :uint32)   ; MESSAGEBOX_STYLE
  (w-language-id :uint16))   ; WORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $MessageBoxExA = Win32::API::More->new('USER32',
    'int MessageBoxExA(HANDLE hWnd, LPCSTR lpText, LPCSTR lpCaption, DWORD uType, WORD wLanguageId)');
# my $ret = $MessageBoxExA->Call($hWnd, $lpText, $lpCaption, $uType, $wLanguageId);
# hWnd : HWND optional -> HANDLE
# lpText : LPCSTR optional -> LPCSTR
# lpCaption : LPCSTR optional -> LPCSTR
# uType : MESSAGEBOX_STYLE -> DWORD
# wLanguageId : WORD -> WORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。