DdeInitializeA

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

DWORD DdeInitializeA(
    DWORD* pidInst,
    PFNCALLBACK pfnCallback,
    DDE_INITIALIZE_COMMAND afCmd,
    DWORD ulRes   // optional
);

<DllImport("USER32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function DdeInitializeA(
    ByRef pidInst As UInteger,   ' DWORD* in/out
    pfnCallback As IntPtr,   ' PFNCALLBACK
    afCmd As UInteger,   ' DDE_INITIALIZE_COMMAND
    ulRes As UInteger   ' DWORD optional
) As UInteger
End Function

' pidInst : DWORD* in/out
' pfnCallback : PFNCALLBACK
' afCmd : DDE_INITIALIZE_COMMAND
' ulRes : DWORD optional
Declare PtrSafe Function DdeInitializeA Lib "user32" ( _
    ByRef pidInst As Long, _
    ByVal pfnCallback As LongPtr, _
    ByVal afCmd As Long, _
    ByVal ulRes As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

DdeInitializeA = ctypes.windll.user32.DdeInitializeA
DdeInitializeA.restype = wintypes.DWORD
DdeInitializeA.argtypes = [
    ctypes.POINTER(wintypes.DWORD),  # pidInst : DWORD* in/out
    ctypes.c_void_p,  # pfnCallback : PFNCALLBACK
    wintypes.DWORD,  # afCmd : DDE_INITIALIZE_COMMAND
    wintypes.DWORD,  # ulRes : DWORD optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
DdeInitializeA = Fiddle::Function.new(
  lib['DdeInitializeA'],
  [
    Fiddle::TYPE_VOIDP,  # pidInst : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # pfnCallback : PFNCALLBACK
    -Fiddle::TYPE_INT,  # afCmd : DDE_INITIALIZE_COMMAND
    -Fiddle::TYPE_INT,  # ulRes : DWORD optional
  ],
  -Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn DdeInitializeA(
        pidInst: *mut u32,  // DWORD* in/out
        pfnCallback: *const core::ffi::c_void,  // PFNCALLBACK
        afCmd: u32,  // DDE_INITIALIZE_COMMAND
        ulRes: u32  // DWORD optional
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", CharSet = CharSet.Ansi)]
public static extern uint DdeInitializeA(ref uint pidInst, IntPtr pfnCallback, uint afCmd, uint ulRes);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_DdeInitializeA' -Namespace Win32 -PassThru
# $api::DdeInitializeA(pidInst, pfnCallback, afCmd, ulRes)

#uselib "USER32.dll"
#func global DdeInitializeA "DdeInitializeA" sptr, sptr, sptr, sptr
; DdeInitializeA varptr(pidInst), pfnCallback, afCmd, ulRes   ; 戻り値は stat
; pidInst : DWORD* in/out -> "sptr"
; pfnCallback : PFNCALLBACK -> "sptr"
; afCmd : DDE_INITIALIZE_COMMAND -> "sptr"
; ulRes : DWORD optional -> "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。

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procDdeInitializeA = user32.NewProc("DdeInitializeA")
)

// pidInst (DWORD* in/out), pfnCallback (PFNCALLBACK), afCmd (DDE_INITIALIZE_COMMAND), ulRes (DWORD optional)
r1, _, err := procDdeInitializeA.Call(
	uintptr(pidInst),
	uintptr(pfnCallback),
	uintptr(afCmd),
	uintptr(ulRes),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DdeInitializeA(
  pidInst: Pointer;   // DWORD* in/out
  pfnCallback: Pointer;   // PFNCALLBACK
  afCmd: DWORD;   // DDE_INITIALIZE_COMMAND
  ulRes: DWORD   // DWORD optional
): DWORD; stdcall;
  external 'USER32.dll' name 'DdeInitializeA';

result := DllCall("USER32\DdeInitializeA"
    , "Ptr", pidInst   ; DWORD* in/out
    , "Ptr", pfnCallback   ; PFNCALLBACK
    , "UInt", afCmd   ; DDE_INITIALIZE_COMMAND
    , "UInt", ulRes   ; DWORD optional
    , "UInt")   ; return: DWORD

●DdeInitializeA(pidInst, pfnCallback, afCmd, ulRes) = DLL("USER32.dll", "dword DdeInitializeA(void*, void*, dword, dword)")
# 呼び出し: DdeInitializeA(pidInst, pfnCallback, afCmd, ulRes)
# pidInst : DWORD* in/out -> "void*"
# pfnCallback : PFNCALLBACK -> "void*"
# afCmd : DDE_INITIALIZE_COMMAND -> "dword"
# ulRes : DWORD optional -> "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 DdeInitializeA(
    pidInst: [*c]u32, // DWORD* in/out
    pfnCallback: ?*anyopaque, // PFNCALLBACK
    afCmd: u32, // DDE_INITIALIZE_COMMAND
    ulRes: u32 // DWORD optional
) callconv(std.os.windows.WINAPI) u32;

proc DdeInitializeA(
    pidInst: ptr uint32,  # DWORD* in/out
    pfnCallback: pointer,  # PFNCALLBACK
    afCmd: uint32,  # DDE_INITIALIZE_COMMAND
    ulRes: uint32  # DWORD optional
): uint32 {.importc: "DdeInitializeA", stdcall, dynlib: "USER32.dll".}

pragma(lib, "user32");
extern(Windows)
uint DdeInitializeA(
    uint* pidInst,   // DWORD* in/out
    void* pfnCallback,   // PFNCALLBACK
    uint afCmd,   // DDE_INITIALIZE_COMMAND
    uint ulRes   // DWORD optional
);

ccall((:DdeInitializeA, "USER32.dll"), stdcall, UInt32,
      (Ptr{UInt32}, Ptr{Cvoid}, UInt32, UInt32),
      pidInst, pfnCallback, afCmd, ulRes)
# pidInst : DWORD* in/out -> Ptr{UInt32}
# pfnCallback : PFNCALLBACK -> Ptr{Cvoid}
# afCmd : DDE_INITIALIZE_COMMAND -> UInt32
# ulRes : DWORD optional -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t DdeInitializeA(
    uint32_t* pidInst,
    void* pfnCallback,
    uint32_t afCmd,
    uint32_t ulRes);
]]
local user32 = ffi.load("user32")
-- user32.DdeInitializeA(pidInst, pfnCallback, afCmd, ulRes)
-- pidInst : DWORD* in/out
-- pfnCallback : PFNCALLBACK
-- afCmd : DDE_INITIALIZE_COMMAND
-- ulRes : DWORD optional
-- 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 DdeInitializeA = lib.func('__stdcall', 'DdeInitializeA', 'uint32_t', ['uint32_t *', 'void *', 'uint32_t', 'uint32_t']);
// DdeInitializeA(pidInst, pfnCallback, afCmd, ulRes)
// pidInst : DWORD* in/out -> 'uint32_t *'
// pfnCallback : PFNCALLBACK -> 'void *'
// afCmd : DDE_INITIALIZE_COMMAND -> 'uint32_t'
// ulRes : DWORD optional -> 'uint32_t'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。
// コールバック(関数ポインタ)は koffi.proto/koffi.register で型を定義して渡す(素の void* では JS 関数を渡せない)。

const lib = Deno.dlopen("USER32.dll", {
  DdeInitializeA: { parameters: ["pointer", "pointer", "u32", "u32"], result: "u32" },
});
// lib.symbols.DdeInitializeA(pidInst, pfnCallback, afCmd, ulRes)
// pidInst : DWORD* in/out -> "pointer"
// pfnCallback : PFNCALLBACK -> "pointer"
// afCmd : DDE_INITIALIZE_COMMAND -> "u32"
// ulRes : DWORD optional -> "u32"
// 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
uint32_t DdeInitializeA(
    uint32_t* pidInst,
    void* pfnCallback,
    uint32_t afCmd,
    uint32_t ulRes);
C, "USER32.dll");
// $ffi->DdeInitializeA(pidInst, pfnCallback, afCmd, ulRes);
// pidInst : DWORD* in/out
// pfnCallback : PFNCALLBACK
// afCmd : DDE_INITIALIZE_COMMAND
// ulRes : DWORD optional
// 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 DdeInitializeA(
        IntByReference pidInst,   // DWORD* in/out
        Callback pfnCallback,   // PFNCALLBACK
        int afCmd,   // DDE_INITIALIZE_COMMAND
        int ulRes   // DWORD optional
    );
}

@[Link("user32")]
lib LibUSER32
  fun DdeInitializeA = DdeInitializeA(
    pidInst : UInt32*,   # DWORD* in/out
    pfnCallback : Void*,   # PFNCALLBACK
    afCmd : UInt32,   # DDE_INITIALIZE_COMMAND
    ulRes : UInt32   # DWORD optional
  ) : UInt32
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 DdeInitializeANative = Uint32 Function(Pointer<Uint32>, Pointer<Void>, Uint32, Uint32);
typedef DdeInitializeADart = int Function(Pointer<Uint32>, Pointer<Void>, int, int);
final DdeInitializeA = DynamicLibrary.open('USER32.dll')
    .lookupFunction<DdeInitializeANative, DdeInitializeADart>('DdeInitializeA');
// pidInst : DWORD* in/out -> Pointer<Uint32>
// pfnCallback : PFNCALLBACK -> Pointer<Void>
// afCmd : DDE_INITIALIZE_COMMAND -> Uint32
// ulRes : DWORD optional -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DdeInitializeA(
  pidInst: Pointer;   // DWORD* in/out
  pfnCallback: Pointer;   // PFNCALLBACK
  afCmd: DWORD;   // DDE_INITIALIZE_COMMAND
  ulRes: DWORD   // DWORD optional
): DWORD; stdcall;
  external 'USER32.dll' name 'DdeInitializeA';

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

foreign import stdcall safe "DdeInitializeA"
  c_DdeInitializeA :: Ptr Word32 -> Ptr () -> Word32 -> Word32 -> IO Word32
-- pidInst : DWORD* in/out -> Ptr Word32
-- pfnCallback : PFNCALLBACK -> Ptr ()
-- afCmd : DDE_INITIALIZE_COMMAND -> Word32
-- ulRes : DWORD optional -> 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 ddeinitializea =
  foreign "DdeInitializeA"
    ((ptr uint32_t) @-> (ptr void) @-> uint32_t @-> uint32_t @-> returning uint32_t)
(* pidInst : DWORD* in/out -> (ptr uint32_t) *)
(* pfnCallback : PFNCALLBACK -> (ptr void) *)
(* afCmd : DDE_INITIALIZE_COMMAND -> uint32_t *)
(* ulRes : DWORD optional -> 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 ("DdeInitializeA" dde-initialize-a :convention :stdcall) :uint32
  (pid-inst :pointer)   ; DWORD* in/out
  (pfn-callback :pointer)   ; PFNCALLBACK
  (af-cmd :uint32)   ; DDE_INITIALIZE_COMMAND
  (ul-res :uint32))   ; DWORD optional
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $DdeInitializeA = Win32::API::More->new('USER32',
    'DWORD DdeInitializeA(LPVOID pidInst, LPVOID pfnCallback, DWORD afCmd, DWORD ulRes)');
# my $ret = $DdeInitializeA->Call($pidInst, $pfnCallback, $afCmd, $ulRes);
# pidInst : DWORD* in/out -> LPVOID
# pfnCallback : PFNCALLBACK -> LPVOID
# afCmd : DDE_INITIALIZE_COMMAND -> DWORD
# ulRes : DWORD optional -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。
# コールバック(関数ポインタ)は Perl sub を直接渡せません。Win32::API::Callback を使用してください。