HeapAlloc

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

void* HeapAlloc(
    HANDLE hHeap,
    HEAP_FLAGS dwFlags,
    UINT_PTR dwBytes
);

<DllImport("KERNEL32.dll", ExactSpelling:=True)>
Public Shared Function HeapAlloc(
    hHeap As IntPtr,   ' HANDLE
    dwFlags As UInteger,   ' HEAP_FLAGS
    dwBytes As UIntPtr   ' UINT_PTR
) As IntPtr
End Function

' hHeap : HANDLE
' dwFlags : HEAP_FLAGS
' dwBytes : UINT_PTR
Declare PtrSafe Function HeapAlloc Lib "kernel32" ( _
    ByVal hHeap As LongPtr, _
    ByVal dwFlags As Long, _
    ByVal dwBytes 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

HeapAlloc = ctypes.windll.kernel32.HeapAlloc
HeapAlloc.restype = ctypes.c_void_p
HeapAlloc.argtypes = [
    wintypes.HANDLE,  # hHeap : HANDLE
    wintypes.DWORD,  # dwFlags : HEAP_FLAGS
    ctypes.c_size_t,  # dwBytes : UINT_PTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
HeapAlloc = Fiddle::Function.new(
  lib['HeapAlloc'],
  [
    Fiddle::TYPE_VOIDP,  # hHeap : HANDLE
    -Fiddle::TYPE_INT,  # dwFlags : HEAP_FLAGS
    Fiddle::TYPE_UINTPTR_T,  # dwBytes : UINT_PTR
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "kernel32")]
extern "system" {
    fn HeapAlloc(
        hHeap: *mut core::ffi::c_void,  // HANDLE
        dwFlags: u32,  // HEAP_FLAGS
        dwBytes: usize  // UINT_PTR
    ) -> *mut ();
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll")]
public static extern IntPtr HeapAlloc(IntPtr hHeap, uint dwFlags, UIntPtr dwBytes);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_HeapAlloc' -Namespace Win32 -PassThru
# $api::HeapAlloc(hHeap, dwFlags, dwBytes)

#uselib "KERNEL32.dll"
#func global HeapAlloc "HeapAlloc" sptr, sptr, sptr
; HeapAlloc hHeap, dwFlags, dwBytes   ; 戻り値は stat
; hHeap : HANDLE -> "sptr"
; dwFlags : HEAP_FLAGS -> "sptr"
; dwBytes : UINT_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 "KERNEL32.dll"
#cfunc global HeapAlloc "HeapAlloc" sptr, int, sptr
; res = HeapAlloc(hHeap, dwFlags, dwBytes)
; hHeap : HANDLE -> "sptr"
; dwFlags : HEAP_FLAGS -> "int"
; dwBytes : UINT_PTR -> "sptr"

; void* HeapAlloc(HANDLE hHeap, HEAP_FLAGS dwFlags, UINT_PTR dwBytes)
#uselib "KERNEL32.dll"
#cfunc global HeapAlloc "HeapAlloc" intptr, int, intptr
; res = HeapAlloc(hHeap, dwFlags, dwBytes)
; hHeap : HANDLE -> "intptr"
; dwFlags : HEAP_FLAGS -> "int"
; dwBytes : UINT_PTR -> "intptr"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procHeapAlloc = kernel32.NewProc("HeapAlloc")
)

// hHeap (HANDLE), dwFlags (HEAP_FLAGS), dwBytes (UINT_PTR)
r1, _, err := procHeapAlloc.Call(
	uintptr(hHeap),
	uintptr(dwFlags),
	uintptr(dwBytes),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void*

function HeapAlloc(
  hHeap: THandle;   // HANDLE
  dwFlags: DWORD;   // HEAP_FLAGS
  dwBytes: NativeUInt   // UINT_PTR
): Pointer; stdcall;
  external 'KERNEL32.dll' name 'HeapAlloc';

result := DllCall("KERNEL32\HeapAlloc"
    , "Ptr", hHeap   ; HANDLE
    , "UInt", dwFlags   ; HEAP_FLAGS
    , "UPtr", dwBytes   ; UINT_PTR
    , "Ptr")   ; return: void*

●HeapAlloc(hHeap, dwFlags, dwBytes) = DLL("KERNEL32.dll", "void* HeapAlloc(void*, dword, int)")
# 呼び出し: HeapAlloc(hHeap, dwFlags, dwBytes)
# hHeap : HANDLE -> "void*"
# dwFlags : HEAP_FLAGS -> "dword"
# dwBytes : UINT_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 "kernel32" fn HeapAlloc(
    hHeap: ?*anyopaque, // HANDLE
    dwFlags: u32, // HEAP_FLAGS
    dwBytes: usize // UINT_PTR
) callconv(std.os.windows.WINAPI) ?*anyopaque;

proc HeapAlloc(
    hHeap: pointer,  # HANDLE
    dwFlags: uint32,  # HEAP_FLAGS
    dwBytes: uint  # UINT_PTR
): pointer {.importc: "HeapAlloc", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
void* HeapAlloc(
    void* hHeap,   // HANDLE
    uint dwFlags,   // HEAP_FLAGS
    size_t dwBytes   // UINT_PTR
);

ccall((:HeapAlloc, "KERNEL32.dll"), stdcall, Ptr{Cvoid},
      (Ptr{Cvoid}, UInt32, Csize_t),
      hHeap, dwFlags, dwBytes)
# hHeap : HANDLE -> Ptr{Cvoid}
# dwFlags : HEAP_FLAGS -> UInt32
# dwBytes : UINT_PTR -> Csize_t
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void* HeapAlloc(
    void* hHeap,
    uint32_t dwFlags,
    uintptr_t dwBytes);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.HeapAlloc(hHeap, dwFlags, dwBytes)
-- hHeap : HANDLE
-- dwFlags : HEAP_FLAGS
-- dwBytes : UINT_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('KERNEL32.dll');
const HeapAlloc = lib.func('__stdcall', 'HeapAlloc', 'void *', ['void *', 'uint32_t', 'uintptr_t']);
// HeapAlloc(hHeap, dwFlags, dwBytes)
// hHeap : HANDLE -> 'void *'
// dwFlags : HEAP_FLAGS -> 'uint32_t'
// dwBytes : UINT_PTR -> 'uintptr_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", {
  HeapAlloc: { parameters: ["pointer", "u32", "usize"], result: "pointer" },
});
// lib.symbols.HeapAlloc(hHeap, dwFlags, dwBytes)
// hHeap : HANDLE -> "pointer"
// dwFlags : HEAP_FLAGS -> "u32"
// dwBytes : UINT_PTR -> "usize"
// 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
void* HeapAlloc(
    void* hHeap,
    uint32_t dwFlags,
    size_t dwBytes);
C, "KERNEL32.dll");
// $ffi->HeapAlloc(hHeap, dwFlags, dwBytes);
// hHeap : HANDLE
// dwFlags : HEAP_FLAGS
// dwBytes : UINT_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 Kernel32 extends StdCallLibrary {
    Kernel32 INSTANCE = Native.load("kernel32", Kernel32.class);
    Pointer HeapAlloc(
        Pointer hHeap,   // HANDLE
        int dwFlags,   // HEAP_FLAGS
        long dwBytes   // UINT_PTR
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun HeapAlloc = HeapAlloc(
    hHeap : Void*,   # HANDLE
    dwFlags : UInt32,   # HEAP_FLAGS
    dwBytes : LibC::SizeT   # UINT_PTR
  ) : Void*
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 HeapAllocNative = Pointer<Void> Function(Pointer<Void>, Uint32, UintPtr);
typedef HeapAllocDart = Pointer<Void> Function(Pointer<Void>, int, int);
final HeapAlloc = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<HeapAllocNative, HeapAllocDart>('HeapAlloc');
// hHeap : HANDLE -> Pointer<Void>
// dwFlags : HEAP_FLAGS -> Uint32
// dwBytes : UINT_PTR -> UintPtr
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function HeapAlloc(
  hHeap: THandle;   // HANDLE
  dwFlags: DWORD;   // HEAP_FLAGS
  dwBytes: NativeUInt   // UINT_PTR
): Pointer; stdcall;
  external 'KERNEL32.dll' name 'HeapAlloc';

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

foreign import stdcall safe "HeapAlloc"
  c_HeapAlloc :: Ptr () -> Word32 -> CUIntPtr -> IO (Ptr ())
-- hHeap : HANDLE -> Ptr ()
-- dwFlags : HEAP_FLAGS -> Word32
-- dwBytes : UINT_PTR -> CUIntPtr
-- 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 heapalloc =
  foreign "HeapAlloc"
    ((ptr void) @-> uint32_t @-> size_t @-> returning (ptr void))
(* hHeap : HANDLE -> (ptr void) *)
(* dwFlags : HEAP_FLAGS -> uint32_t *)
(* dwBytes : UINT_PTR -> size_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 ("HeapAlloc" heap-alloc :convention :stdcall) :pointer
  (h-heap :pointer)   ; HANDLE
  (dw-flags :uint32)   ; HEAP_FLAGS
  (dw-bytes :uint64))   ; UINT_PTR
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $HeapAlloc = Win32::API::More->new('KERNEL32',
    'LPVOID HeapAlloc(HANDLE hHeap, DWORD dwFlags, WPARAM dwBytes)');
# my $ret = $HeapAlloc->Call($hHeap, $dwFlags, $dwBytes);
# hHeap : HANDLE -> HANDLE
# dwFlags : HEAP_FLAGS -> DWORD
# dwBytes : UINT_PTR -> WPARAM
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。