SetWindowLongA

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

INT SetWindowLongA(
    HWND hWnd,
    WINDOW_LONG_PTR_INDEX nIndex,
    INT dwNewLong
);

<DllImport("USER32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetWindowLongA(
    hWnd As IntPtr,   ' HWND
    nIndex As Integer,   ' WINDOW_LONG_PTR_INDEX
    dwNewLong As Integer   ' INT
) As Integer
End Function

' hWnd : HWND
' nIndex : WINDOW_LONG_PTR_INDEX
' dwNewLong : INT
Declare PtrSafe Function SetWindowLongA Lib "user32" ( _
    ByVal hWnd As LongPtr, _
    ByVal nIndex As Long, _
    ByVal dwNewLong 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

SetWindowLongA = ctypes.windll.user32.SetWindowLongA
SetWindowLongA.restype = ctypes.c_int
SetWindowLongA.argtypes = [
    wintypes.HANDLE,  # hWnd : HWND
    ctypes.c_int,  # nIndex : WINDOW_LONG_PTR_INDEX
    ctypes.c_int,  # dwNewLong : INT
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
SetWindowLongA = Fiddle::Function.new(
  lib['SetWindowLongA'],
  [
    Fiddle::TYPE_VOIDP,  # hWnd : HWND
    Fiddle::TYPE_INT,  # nIndex : WINDOW_LONG_PTR_INDEX
    Fiddle::TYPE_INT,  # dwNewLong : INT
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn SetWindowLongA(
        hWnd: *mut core::ffi::c_void,  // HWND
        nIndex: i32,  // WINDOW_LONG_PTR_INDEX
        dwNewLong: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern int SetWindowLongA(IntPtr hWnd, int nIndex, int dwNewLong);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_SetWindowLongA' -Namespace Win32 -PassThru
# $api::SetWindowLongA(hWnd, nIndex, dwNewLong)

#uselib "USER32.dll"
#func global SetWindowLongA "SetWindowLongA" sptr, sptr, sptr
; SetWindowLongA hWnd, nIndex, dwNewLong   ; 戻り値は stat
; hWnd : HWND -> "sptr"
; nIndex : WINDOW_LONG_PTR_INDEX -> "sptr"
; dwNewLong : INT -> "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 SetWindowLongA "SetWindowLongA" sptr, int, int
; res = SetWindowLongA(hWnd, nIndex, dwNewLong)
; hWnd : HWND -> "sptr"
; nIndex : WINDOW_LONG_PTR_INDEX -> "int"
; dwNewLong : INT -> "int"

; INT SetWindowLongA(HWND hWnd, WINDOW_LONG_PTR_INDEX nIndex, INT dwNewLong)
#uselib "USER32.dll"
#cfunc global SetWindowLongA "SetWindowLongA" intptr, int, int
; res = SetWindowLongA(hWnd, nIndex, dwNewLong)
; hWnd : HWND -> "intptr"
; nIndex : WINDOW_LONG_PTR_INDEX -> "int"
; dwNewLong : INT -> "int"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procSetWindowLongA = user32.NewProc("SetWindowLongA")
)

// hWnd (HWND), nIndex (WINDOW_LONG_PTR_INDEX), dwNewLong (INT)
r1, _, err := procSetWindowLongA.Call(
	uintptr(hWnd),
	uintptr(nIndex),
	uintptr(dwNewLong),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SetWindowLongA(
  hWnd: THandle;   // HWND
  nIndex: Integer;   // WINDOW_LONG_PTR_INDEX
  dwNewLong: Integer   // INT
): Integer; stdcall;
  external 'USER32.dll' name 'SetWindowLongA';

result := DllCall("USER32\SetWindowLongA"
    , "Ptr", hWnd   ; HWND
    , "Int", nIndex   ; WINDOW_LONG_PTR_INDEX
    , "Int", dwNewLong   ; INT
    , "Int")   ; return: INT

●SetWindowLongA(hWnd, nIndex, dwNewLong) = DLL("USER32.dll", "int SetWindowLongA(void*, int, int)")
# 呼び出し: SetWindowLongA(hWnd, nIndex, dwNewLong)
# hWnd : HWND -> "void*"
# nIndex : WINDOW_LONG_PTR_INDEX -> "int"
# dwNewLong : INT -> "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 SetWindowLongA(
    hWnd: ?*anyopaque, // HWND
    nIndex: i32, // WINDOW_LONG_PTR_INDEX
    dwNewLong: i32 // INT
) callconv(std.os.windows.WINAPI) i32;

proc SetWindowLongA(
    hWnd: pointer,  # HWND
    nIndex: int32,  # WINDOW_LONG_PTR_INDEX
    dwNewLong: int32  # INT
): int32 {.importc: "SetWindowLongA", stdcall, dynlib: "USER32.dll".}

pragma(lib, "user32");
extern(Windows)
int SetWindowLongA(
    void* hWnd,   // HWND
    int nIndex,   // WINDOW_LONG_PTR_INDEX
    int dwNewLong   // INT
);

ccall((:SetWindowLongA, "USER32.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Int32, Int32),
      hWnd, nIndex, dwNewLong)
# hWnd : HWND -> Ptr{Cvoid}
# nIndex : WINDOW_LONG_PTR_INDEX -> Int32
# dwNewLong : INT -> Int32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t SetWindowLongA(
    void* hWnd,
    int32_t nIndex,
    int32_t dwNewLong);
]]
local user32 = ffi.load("user32")
-- user32.SetWindowLongA(hWnd, nIndex, dwNewLong)
-- hWnd : HWND
-- nIndex : WINDOW_LONG_PTR_INDEX
-- dwNewLong : INT
-- 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 SetWindowLongA = lib.func('__stdcall', 'SetWindowLongA', 'int32_t', ['void *', 'int32_t', 'int32_t']);
// SetWindowLongA(hWnd, nIndex, dwNewLong)
// hWnd : HWND -> 'void *'
// nIndex : WINDOW_LONG_PTR_INDEX -> 'int32_t'
// dwNewLong : INT -> 'int32_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", {
  SetWindowLongA: { parameters: ["pointer", "i32", "i32"], result: "i32" },
});
// lib.symbols.SetWindowLongA(hWnd, nIndex, dwNewLong)
// hWnd : HWND -> "pointer"
// nIndex : WINDOW_LONG_PTR_INDEX -> "i32"
// dwNewLong : INT -> "i32"
// 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 SetWindowLongA(
    void* hWnd,
    int32_t nIndex,
    int32_t dwNewLong);
C, "USER32.dll");
// $ffi->SetWindowLongA(hWnd, nIndex, dwNewLong);
// hWnd : HWND
// nIndex : WINDOW_LONG_PTR_INDEX
// dwNewLong : INT
// 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 SetWindowLongA(
        Pointer hWnd,   // HWND
        int nIndex,   // WINDOW_LONG_PTR_INDEX
        int dwNewLong   // INT
    );
}

@[Link("user32")]
lib LibUSER32
  fun SetWindowLongA = SetWindowLongA(
    hWnd : Void*,   # HWND
    nIndex : Int32,   # WINDOW_LONG_PTR_INDEX
    dwNewLong : Int32   # INT
  ) : 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 SetWindowLongANative = Int32 Function(Pointer<Void>, Int32, Int32);
typedef SetWindowLongADart = int Function(Pointer<Void>, int, int);
final SetWindowLongA = DynamicLibrary.open('USER32.dll')
    .lookupFunction<SetWindowLongANative, SetWindowLongADart>('SetWindowLongA');
// hWnd : HWND -> Pointer<Void>
// nIndex : WINDOW_LONG_PTR_INDEX -> Int32
// dwNewLong : INT -> Int32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function SetWindowLongA(
  hWnd: THandle;   // HWND
  nIndex: Integer;   // WINDOW_LONG_PTR_INDEX
  dwNewLong: Integer   // INT
): Integer; stdcall;
  external 'USER32.dll' name 'SetWindowLongA';

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

foreign import stdcall safe "SetWindowLongA"
  c_SetWindowLongA :: Ptr () -> Int32 -> Int32 -> IO Int32
-- hWnd : HWND -> Ptr ()
-- nIndex : WINDOW_LONG_PTR_INDEX -> Int32
-- dwNewLong : INT -> Int32
-- 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 setwindowlonga =
  foreign "SetWindowLongA"
    ((ptr void) @-> int32_t @-> int32_t @-> returning int32_t)
(* hWnd : HWND -> (ptr void) *)
(* nIndex : WINDOW_LONG_PTR_INDEX -> int32_t *)
(* dwNewLong : INT -> int32_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 ("SetWindowLongA" set-window-long-a :convention :stdcall) :int32
  (h-wnd :pointer)   ; HWND
  (n-index :int32)   ; WINDOW_LONG_PTR_INDEX
  (dw-new-long :int32))   ; INT
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $SetWindowLongA = Win32::API::More->new('USER32',
    'int SetWindowLongA(HANDLE hWnd, int nIndex, int dwNewLong)');
# my $ret = $SetWindowLongA->Call($hWnd, $nIndex, $dwNewLong);
# hWnd : HWND -> HANDLE
# nIndex : WINDOW_LONG_PTR_INDEX -> int
# dwNewLong : INT -> int
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。