LocalShrink

// KERNEL32.dll
#include <windows.h>

UINT_PTR LocalShrink(
    HLOCAL hMem,
    DWORD cbNewSize
);

<DllImport("KERNEL32.dll", ExactSpelling:=True)>
Public Shared Function LocalShrink(
    hMem As IntPtr,   ' HLOCAL
    cbNewSize As UInteger   ' DWORD
) As UIntPtr
End Function

' hMem : HLOCAL
' cbNewSize : DWORD
Declare PtrSafe Function LocalShrink Lib "kernel32" ( _
    ByVal hMem As LongPtr, _
    ByVal cbNewSize 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

LocalShrink = ctypes.windll.kernel32.LocalShrink
LocalShrink.restype = ctypes.c_size_t
LocalShrink.argtypes = [
    wintypes.HANDLE,  # hMem : HLOCAL
    wintypes.DWORD,  # cbNewSize : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
LocalShrink = Fiddle::Function.new(
  lib['LocalShrink'],
  [
    Fiddle::TYPE_VOIDP,  # hMem : HLOCAL
    -Fiddle::TYPE_INT,  # cbNewSize : DWORD
  ],
  Fiddle::TYPE_UINTPTR_T)

#[link(name = "kernel32")]
extern "system" {
    fn LocalShrink(
        hMem: *mut core::ffi::c_void,  // HLOCAL
        cbNewSize: u32  // DWORD
    ) -> usize;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll")]
public static extern UIntPtr LocalShrink(IntPtr hMem, uint cbNewSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_LocalShrink' -Namespace Win32 -PassThru
# $api::LocalShrink(hMem, cbNewSize)

#uselib "KERNEL32.dll"
#func global LocalShrink "LocalShrink" sptr, sptr
; LocalShrink hMem, cbNewSize   ; 戻り値は stat
; hMem : HLOCAL -> "sptr"
; cbNewSize : DWORD -> "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 "KERNEL32.dll"
#cfunc global LocalShrink "LocalShrink" sptr, int
; res = LocalShrink(hMem, cbNewSize)
; hMem : HLOCAL -> "sptr"
; cbNewSize : DWORD -> "int"

; UINT_PTR LocalShrink(HLOCAL hMem, DWORD cbNewSize)
#uselib "KERNEL32.dll"
#cfunc global LocalShrink "LocalShrink" intptr, int
; res = LocalShrink(hMem, cbNewSize)
; hMem : HLOCAL -> "intptr"
; cbNewSize : DWORD -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procLocalShrink = kernel32.NewProc("LocalShrink")
)

// hMem (HLOCAL), cbNewSize (DWORD)
r1, _, err := procLocalShrink.Call(
	uintptr(hMem),
	uintptr(cbNewSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // UINT_PTR

function LocalShrink(
  hMem: THandle;   // HLOCAL
  cbNewSize: DWORD   // DWORD
): NativeUInt; stdcall;
  external 'KERNEL32.dll' name 'LocalShrink';

result := DllCall("KERNEL32\LocalShrink"
    , "Ptr", hMem   ; HLOCAL
    , "UInt", cbNewSize   ; DWORD
    , "UPtr")   ; return: UINT_PTR

●LocalShrink(hMem, cbNewSize) = DLL("KERNEL32.dll", "int LocalShrink(void*, dword)")
# 呼び出し: LocalShrink(hMem, cbNewSize)
# hMem : HLOCAL -> "void*"
# cbNewSize : DWORD -> "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 "kernel32" fn LocalShrink(
    hMem: ?*anyopaque, // HLOCAL
    cbNewSize: u32 // DWORD
) callconv(std.os.windows.WINAPI) usize;

proc LocalShrink(
    hMem: pointer,  # HLOCAL
    cbNewSize: uint32  # DWORD
): uint {.importc: "LocalShrink", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
size_t LocalShrink(
    void* hMem,   // HLOCAL
    uint cbNewSize   // DWORD
);

ccall((:LocalShrink, "KERNEL32.dll"), stdcall, Csize_t,
      (Ptr{Cvoid}, UInt32),
      hMem, cbNewSize)
# hMem : HLOCAL -> Ptr{Cvoid}
# cbNewSize : DWORD -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uintptr_t LocalShrink(
    void* hMem,
    uint32_t cbNewSize);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.LocalShrink(hMem, cbNewSize)
-- hMem : HLOCAL
-- cbNewSize : DWORD
-- 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('KERNEL32.dll');
const LocalShrink = lib.func('__stdcall', 'LocalShrink', 'uintptr_t', ['void *', 'uint32_t']);
// LocalShrink(hMem, cbNewSize)
// hMem : HLOCAL -> 'void *'
// cbNewSize : DWORD -> 'uint32_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("KERNEL32.dll", {
  LocalShrink: { parameters: ["pointer", "u32"], result: "usize" },
});
// lib.symbols.LocalShrink(hMem, cbNewSize)
// hMem : HLOCAL -> "pointer"
// cbNewSize : DWORD -> "u32"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
size_t LocalShrink(
    void* hMem,
    uint32_t cbNewSize);
C, "KERNEL32.dll");
// $ffi->LocalShrink(hMem, cbNewSize);
// hMem : HLOCAL
// cbNewSize : DWORD
// 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 Kernel32 extends StdCallLibrary {
    Kernel32 INSTANCE = Native.load("kernel32", Kernel32.class);
    long LocalShrink(
        Pointer hMem,   // HLOCAL
        int cbNewSize   // DWORD
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun LocalShrink = LocalShrink(
    hMem : Void*,   # HLOCAL
    cbNewSize : UInt32   # DWORD
  ) : 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 LocalShrinkNative = UintPtr Function(Pointer<Void>, Uint32);
typedef LocalShrinkDart = int Function(Pointer<Void>, int);
final LocalShrink = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<LocalShrinkNative, LocalShrinkDart>('LocalShrink');
// hMem : HLOCAL -> Pointer<Void>
// cbNewSize : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function LocalShrink(
  hMem: THandle;   // HLOCAL
  cbNewSize: DWORD   // DWORD
): NativeUInt; stdcall;
  external 'KERNEL32.dll' name 'LocalShrink';

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

foreign import stdcall safe "LocalShrink"
  c_LocalShrink :: Ptr () -> Word32 -> IO CUIntPtr
-- hMem : HLOCAL -> Ptr ()
-- cbNewSize : DWORD -> 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 localshrink =
  foreign "LocalShrink"
    ((ptr void) @-> uint32_t @-> returning size_t)
(* hMem : HLOCAL -> (ptr void) *)
(* cbNewSize : DWORD -> 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 kernel32 (t "KERNEL32.dll"))
(cffi:use-foreign-library kernel32)

(cffi:defcfun ("LocalShrink" local-shrink :convention :stdcall) :uint64
  (h-mem :pointer)   ; HLOCAL
  (cb-new-size :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $LocalShrink = Win32::API::More->new('KERNEL32',
    'WPARAM LocalShrink(HANDLE hMem, DWORD cbNewSize)');
# my $ret = $LocalShrink->Call($hMem, $cbNewSize);
# hMem : HLOCAL -> HANDLE
# cbNewSize : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。