VirtualAlloc

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

void* VirtualAlloc(
    void* lpAddress,   // optional
    UINT_PTR dwSize,
    VIRTUAL_ALLOCATION_TYPE flAllocationType,
    PAGE_PROTECTION_FLAGS flProtect
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function VirtualAlloc(
    lpAddress As IntPtr,   ' void* optional
    dwSize As UIntPtr,   ' UINT_PTR
    flAllocationType As UInteger,   ' VIRTUAL_ALLOCATION_TYPE
    flProtect As UInteger   ' PAGE_PROTECTION_FLAGS
) As IntPtr
End Function

' lpAddress : void* optional
' dwSize : UINT_PTR
' flAllocationType : VIRTUAL_ALLOCATION_TYPE
' flProtect : PAGE_PROTECTION_FLAGS
Declare PtrSafe Function VirtualAlloc Lib "kernel32" ( _
    ByVal lpAddress As LongPtr, _
    ByVal dwSize As LongPtr, _
    ByVal flAllocationType As Long, _
    ByVal flProtect 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

VirtualAlloc = ctypes.windll.kernel32.VirtualAlloc
VirtualAlloc.restype = ctypes.c_void_p
VirtualAlloc.argtypes = [
    ctypes.POINTER(None),  # lpAddress : void* optional
    ctypes.c_size_t,  # dwSize : UINT_PTR
    wintypes.DWORD,  # flAllocationType : VIRTUAL_ALLOCATION_TYPE
    wintypes.DWORD,  # flProtect : PAGE_PROTECTION_FLAGS
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
VirtualAlloc = Fiddle::Function.new(
  lib['VirtualAlloc'],
  [
    Fiddle::TYPE_VOIDP,  # lpAddress : void* optional
    Fiddle::TYPE_UINTPTR_T,  # dwSize : UINT_PTR
    -Fiddle::TYPE_INT,  # flAllocationType : VIRTUAL_ALLOCATION_TYPE
    -Fiddle::TYPE_INT,  # flProtect : PAGE_PROTECTION_FLAGS
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "kernel32")]
extern "system" {
    fn VirtualAlloc(
        lpAddress: *mut (),  // void* optional
        dwSize: usize,  // UINT_PTR
        flAllocationType: u32,  // VIRTUAL_ALLOCATION_TYPE
        flProtect: u32  // PAGE_PROTECTION_FLAGS
    ) -> *mut ();
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern IntPtr VirtualAlloc(IntPtr lpAddress, UIntPtr dwSize, uint flAllocationType, uint flProtect);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_VirtualAlloc' -Namespace Win32 -PassThru
# $api::VirtualAlloc(lpAddress, dwSize, flAllocationType, flProtect)

#uselib "KERNEL32.dll"
#func global VirtualAlloc "VirtualAlloc" sptr, sptr, sptr, sptr
; VirtualAlloc lpAddress, dwSize, flAllocationType, flProtect   ; 戻り値は stat
; lpAddress : void* optional -> "sptr"
; dwSize : UINT_PTR -> "sptr"
; flAllocationType : VIRTUAL_ALLOCATION_TYPE -> "sptr"
; flProtect : PAGE_PROTECTION_FLAGS -> "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 VirtualAlloc "VirtualAlloc" sptr, sptr, int, int
; res = VirtualAlloc(lpAddress, dwSize, flAllocationType, flProtect)
; lpAddress : void* optional -> "sptr"
; dwSize : UINT_PTR -> "sptr"
; flAllocationType : VIRTUAL_ALLOCATION_TYPE -> "int"
; flProtect : PAGE_PROTECTION_FLAGS -> "int"

; void* VirtualAlloc(void* lpAddress, UINT_PTR dwSize, VIRTUAL_ALLOCATION_TYPE flAllocationType, PAGE_PROTECTION_FLAGS flProtect)
#uselib "KERNEL32.dll"
#cfunc global VirtualAlloc "VirtualAlloc" intptr, intptr, int, int
; res = VirtualAlloc(lpAddress, dwSize, flAllocationType, flProtect)
; lpAddress : void* optional -> "intptr"
; dwSize : UINT_PTR -> "intptr"
; flAllocationType : VIRTUAL_ALLOCATION_TYPE -> "int"
; flProtect : PAGE_PROTECTION_FLAGS -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procVirtualAlloc = kernel32.NewProc("VirtualAlloc")
)

// lpAddress (void* optional), dwSize (UINT_PTR), flAllocationType (VIRTUAL_ALLOCATION_TYPE), flProtect (PAGE_PROTECTION_FLAGS)
r1, _, err := procVirtualAlloc.Call(
	uintptr(lpAddress),
	uintptr(dwSize),
	uintptr(flAllocationType),
	uintptr(flProtect),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void*

function VirtualAlloc(
  lpAddress: Pointer;   // void* optional
  dwSize: NativeUInt;   // UINT_PTR
  flAllocationType: DWORD;   // VIRTUAL_ALLOCATION_TYPE
  flProtect: DWORD   // PAGE_PROTECTION_FLAGS
): Pointer; stdcall;
  external 'KERNEL32.dll' name 'VirtualAlloc';

result := DllCall("KERNEL32\VirtualAlloc"
    , "Ptr", lpAddress   ; void* optional
    , "UPtr", dwSize   ; UINT_PTR
    , "UInt", flAllocationType   ; VIRTUAL_ALLOCATION_TYPE
    , "UInt", flProtect   ; PAGE_PROTECTION_FLAGS
    , "Ptr")   ; return: void*

●VirtualAlloc(lpAddress, dwSize, flAllocationType, flProtect) = DLL("KERNEL32.dll", "void* VirtualAlloc(void*, int, dword, dword)")
# 呼び出し: VirtualAlloc(lpAddress, dwSize, flAllocationType, flProtect)
# lpAddress : void* optional -> "void*"
# dwSize : UINT_PTR -> "int"
# flAllocationType : VIRTUAL_ALLOCATION_TYPE -> "dword"
# flProtect : PAGE_PROTECTION_FLAGS -> "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 VirtualAlloc(
    lpAddress: ?*anyopaque, // void* optional
    dwSize: usize, // UINT_PTR
    flAllocationType: u32, // VIRTUAL_ALLOCATION_TYPE
    flProtect: u32 // PAGE_PROTECTION_FLAGS
) callconv(std.os.windows.WINAPI) ?*anyopaque;

proc VirtualAlloc(
    lpAddress: pointer,  # void* optional
    dwSize: uint,  # UINT_PTR
    flAllocationType: uint32,  # VIRTUAL_ALLOCATION_TYPE
    flProtect: uint32  # PAGE_PROTECTION_FLAGS
): pointer {.importc: "VirtualAlloc", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
void* VirtualAlloc(
    void* lpAddress,   // void* optional
    size_t dwSize,   // UINT_PTR
    uint flAllocationType,   // VIRTUAL_ALLOCATION_TYPE
    uint flProtect   // PAGE_PROTECTION_FLAGS
);

ccall((:VirtualAlloc, "KERNEL32.dll"), stdcall, Ptr{Cvoid},
      (Ptr{Cvoid}, Csize_t, UInt32, UInt32),
      lpAddress, dwSize, flAllocationType, flProtect)
# lpAddress : void* optional -> Ptr{Cvoid}
# dwSize : UINT_PTR -> Csize_t
# flAllocationType : VIRTUAL_ALLOCATION_TYPE -> UInt32
# flProtect : PAGE_PROTECTION_FLAGS -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void* VirtualAlloc(
    void* lpAddress,
    uintptr_t dwSize,
    uint32_t flAllocationType,
    uint32_t flProtect);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.VirtualAlloc(lpAddress, dwSize, flAllocationType, flProtect)
-- lpAddress : void* optional
-- dwSize : UINT_PTR
-- flAllocationType : VIRTUAL_ALLOCATION_TYPE
-- flProtect : PAGE_PROTECTION_FLAGS
-- 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 VirtualAlloc = lib.func('__stdcall', 'VirtualAlloc', 'void *', ['void *', 'uintptr_t', 'uint32_t', 'uint32_t']);
// VirtualAlloc(lpAddress, dwSize, flAllocationType, flProtect)
// lpAddress : void* optional -> 'void *'
// dwSize : UINT_PTR -> 'uintptr_t'
// flAllocationType : VIRTUAL_ALLOCATION_TYPE -> 'uint32_t'
// flProtect : PAGE_PROTECTION_FLAGS -> '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", {
  VirtualAlloc: { parameters: ["pointer", "usize", "u32", "u32"], result: "pointer" },
});
// lib.symbols.VirtualAlloc(lpAddress, dwSize, flAllocationType, flProtect)
// lpAddress : void* optional -> "pointer"
// dwSize : UINT_PTR -> "usize"
// flAllocationType : VIRTUAL_ALLOCATION_TYPE -> "u32"
// flProtect : PAGE_PROTECTION_FLAGS -> "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
void* VirtualAlloc(
    void* lpAddress,
    size_t dwSize,
    uint32_t flAllocationType,
    uint32_t flProtect);
C, "KERNEL32.dll");
// $ffi->VirtualAlloc(lpAddress, dwSize, flAllocationType, flProtect);
// lpAddress : void* optional
// dwSize : UINT_PTR
// flAllocationType : VIRTUAL_ALLOCATION_TYPE
// flProtect : PAGE_PROTECTION_FLAGS
// 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 VirtualAlloc(
        Pointer lpAddress,   // void* optional
        long dwSize,   // UINT_PTR
        int flAllocationType,   // VIRTUAL_ALLOCATION_TYPE
        int flProtect   // PAGE_PROTECTION_FLAGS
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun VirtualAlloc = VirtualAlloc(
    lpAddress : Void*,   # void* optional
    dwSize : LibC::SizeT,   # UINT_PTR
    flAllocationType : UInt32,   # VIRTUAL_ALLOCATION_TYPE
    flProtect : UInt32   # PAGE_PROTECTION_FLAGS
  ) : 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 VirtualAllocNative = Pointer<Void> Function(Pointer<Void>, UintPtr, Uint32, Uint32);
typedef VirtualAllocDart = Pointer<Void> Function(Pointer<Void>, int, int, int);
final VirtualAlloc = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<VirtualAllocNative, VirtualAllocDart>('VirtualAlloc');
// lpAddress : void* optional -> Pointer<Void>
// dwSize : UINT_PTR -> UintPtr
// flAllocationType : VIRTUAL_ALLOCATION_TYPE -> Uint32
// flProtect : PAGE_PROTECTION_FLAGS -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function VirtualAlloc(
  lpAddress: Pointer;   // void* optional
  dwSize: NativeUInt;   // UINT_PTR
  flAllocationType: DWORD;   // VIRTUAL_ALLOCATION_TYPE
  flProtect: DWORD   // PAGE_PROTECTION_FLAGS
): Pointer; stdcall;
  external 'KERNEL32.dll' name 'VirtualAlloc';

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

foreign import stdcall safe "VirtualAlloc"
  c_VirtualAlloc :: Ptr () -> CUIntPtr -> Word32 -> Word32 -> IO (Ptr ())
-- lpAddress : void* optional -> Ptr ()
-- dwSize : UINT_PTR -> CUIntPtr
-- flAllocationType : VIRTUAL_ALLOCATION_TYPE -> Word32
-- flProtect : PAGE_PROTECTION_FLAGS -> 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 virtualalloc =
  foreign "VirtualAlloc"
    ((ptr void) @-> size_t @-> uint32_t @-> uint32_t @-> returning (ptr void))
(* lpAddress : void* optional -> (ptr void) *)
(* dwSize : UINT_PTR -> size_t *)
(* flAllocationType : VIRTUAL_ALLOCATION_TYPE -> uint32_t *)
(* flProtect : PAGE_PROTECTION_FLAGS -> 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 ("VirtualAlloc" virtual-alloc :convention :stdcall) :pointer
  (lp-address :pointer)   ; void* optional
  (dw-size :uint64)   ; UINT_PTR
  (fl-allocation-type :uint32)   ; VIRTUAL_ALLOCATION_TYPE
  (fl-protect :uint32))   ; PAGE_PROTECTION_FLAGS
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $VirtualAlloc = Win32::API::More->new('KERNEL32',
    'LPVOID VirtualAlloc(LPVOID lpAddress, WPARAM dwSize, DWORD flAllocationType, DWORD flProtect)');
# my $ret = $VirtualAlloc->Call($lpAddress, $dwSize, $flAllocationType, $flProtect);
# lpAddress : void* optional -> LPVOID
# dwSize : UINT_PTR -> WPARAM
# flAllocationType : VIRTUAL_ALLOCATION_TYPE -> DWORD
# flProtect : PAGE_PROTECTION_FLAGS -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。