GetWindowLongPtrA

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

INT_PTR GetWindowLongPtrA(
    HWND hWnd,
    WINDOW_LONG_PTR_INDEX nIndex
);

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

' hWnd : HWND
' nIndex : WINDOW_LONG_PTR_INDEX
Declare PtrSafe Function GetWindowLongPtrA Lib "user32" ( _
    ByVal hWnd As LongPtr, _
    ByVal nIndex As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

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

require 'fiddle'
require 'fiddle/import'

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

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

$sig = @"
[DllImport("USER32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern IntPtr GetWindowLongPtrA(IntPtr hWnd, int nIndex);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_GetWindowLongPtrA' -Namespace Win32 -PassThru
# $api::GetWindowLongPtrA(hWnd, nIndex)

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

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

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procGetWindowLongPtrA = user32.NewProc("GetWindowLongPtrA")
)

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

function GetWindowLongPtrA(
  hWnd: THandle;   // HWND
  nIndex: Integer   // WINDOW_LONG_PTR_INDEX
): NativeInt; stdcall;
  external 'USER32.dll' name 'GetWindowLongPtrA';

result := DllCall("USER32\GetWindowLongPtrA"
    , "Ptr", hWnd   ; HWND
    , "Int", nIndex   ; WINDOW_LONG_PTR_INDEX
    , "Ptr")   ; return: INT_PTR

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

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

pragma(lib, "user32");
extern(Windows)
ptrdiff_t GetWindowLongPtrA(
    void* hWnd,   // HWND
    int nIndex   // WINDOW_LONG_PTR_INDEX
);

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

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

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

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

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

foreign import stdcall safe "GetWindowLongPtrA"
  c_GetWindowLongPtrA :: Ptr () -> Int32 -> IO CIntPtr
-- hWnd : HWND -> Ptr ()
-- nIndex : WINDOW_LONG_PTR_INDEX -> 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 getwindowlongptra =
  foreign "GetWindowLongPtrA"
    ((ptr void) @-> int32_t @-> returning intptr_t)
(* hWnd : HWND -> (ptr void) *)
(* nIndex : WINDOW_LONG_PTR_INDEX -> 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 ("GetWindowLongPtrA" get-window-long-ptr-a :convention :stdcall) :int64
  (h-wnd :pointer)   ; HWND
  (n-index :int32))   ; WINDOW_LONG_PTR_INDEX
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

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