SetClassLongPtrA

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

UINT_PTR SetClassLongPtrA(
    HWND hWnd,
    GET_CLASS_LONG_INDEX nIndex,
    INT_PTR dwNewLong
);

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

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

import ctypes
from ctypes import wintypes

SetClassLongPtrA = ctypes.windll.user32.SetClassLongPtrA
SetClassLongPtrA.restype = ctypes.c_size_t
SetClassLongPtrA.argtypes = [
    wintypes.HANDLE,  # hWnd : HWND
    ctypes.c_int,  # nIndex : GET_CLASS_LONG_INDEX
    ctypes.c_ssize_t,  # dwNewLong : INT_PTR
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
SetClassLongPtrA = Fiddle::Function.new(
  lib['SetClassLongPtrA'],
  [
    Fiddle::TYPE_VOIDP,  # hWnd : HWND
    Fiddle::TYPE_INT,  # nIndex : GET_CLASS_LONG_INDEX
    Fiddle::TYPE_INTPTR_T,  # dwNewLong : INT_PTR
  ],
  Fiddle::TYPE_UINTPTR_T)

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

$sig = @"
[DllImport("USER32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern UIntPtr SetClassLongPtrA(IntPtr hWnd, int nIndex, IntPtr dwNewLong);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_SetClassLongPtrA' -Namespace Win32 -PassThru
# $api::SetClassLongPtrA(hWnd, nIndex, dwNewLong)

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

; UINT_PTR SetClassLongPtrA(HWND hWnd, GET_CLASS_LONG_INDEX nIndex, INT_PTR dwNewLong)
#uselib "USER32.dll"
#cfunc global SetClassLongPtrA "SetClassLongPtrA" intptr, int, intptr
; res = SetClassLongPtrA(hWnd, nIndex, dwNewLong)
; hWnd : HWND -> "intptr"
; nIndex : GET_CLASS_LONG_INDEX -> "int"
; dwNewLong : INT_PTR -> "intptr"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procSetClassLongPtrA = user32.NewProc("SetClassLongPtrA")
)

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

function SetClassLongPtrA(
  hWnd: THandle;   // HWND
  nIndex: Integer;   // GET_CLASS_LONG_INDEX
  dwNewLong: NativeInt   // INT_PTR
): NativeUInt; stdcall;
  external 'USER32.dll' name 'SetClassLongPtrA';

result := DllCall("USER32\SetClassLongPtrA"
    , "Ptr", hWnd   ; HWND
    , "Int", nIndex   ; GET_CLASS_LONG_INDEX
    , "Ptr", dwNewLong   ; INT_PTR
    , "UPtr")   ; return: UINT_PTR

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

proc SetClassLongPtrA(
    hWnd: pointer,  # HWND
    nIndex: int32,  # GET_CLASS_LONG_INDEX
    dwNewLong: int  # INT_PTR
): uint {.importc: "SetClassLongPtrA", stdcall, dynlib: "USER32.dll".}

pragma(lib, "user32");
extern(Windows)
size_t SetClassLongPtrA(
    void* hWnd,   // HWND
    int nIndex,   // GET_CLASS_LONG_INDEX
    ptrdiff_t dwNewLong   // INT_PTR
);

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

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

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

{$mode objfpc}{$H+}
function SetClassLongPtrA(
  hWnd: THandle;   // HWND
  nIndex: Integer;   // GET_CLASS_LONG_INDEX
  dwNewLong: NativeInt   // INT_PTR
): NativeUInt; stdcall;
  external 'USER32.dll' name 'SetClassLongPtrA';

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

foreign import stdcall safe "SetClassLongPtrA"
  c_SetClassLongPtrA :: Ptr () -> Int32 -> CIntPtr -> IO CUIntPtr
-- hWnd : HWND -> Ptr ()
-- nIndex : GET_CLASS_LONG_INDEX -> Int32
-- dwNewLong : INT_PTR -> CIntPtr
-- 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 setclasslongptra =
  foreign "SetClassLongPtrA"
    ((ptr void) @-> int32_t @-> intptr_t @-> returning size_t)
(* hWnd : HWND -> (ptr void) *)
(* nIndex : GET_CLASS_LONG_INDEX -> int32_t *)
(* dwNewLong : INT_PTR -> intptr_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 ("SetClassLongPtrA" set-class-long-ptr-a :convention :stdcall) :uint64
  (h-wnd :pointer)   ; HWND
  (n-index :int32)   ; GET_CLASS_LONG_INDEX
  (dw-new-long :int64))   ; INT_PTR
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

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