ReadProcessMemory

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

BOOL ReadProcessMemory(
    HANDLE hProcess,
    const void* lpBaseAddress,
    void* lpBuffer,
    UINT_PTR nSize,
    UINT_PTR* lpNumberOfBytesRead   // optional
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function ReadProcessMemory(
    hProcess As IntPtr,   ' HANDLE
    lpBaseAddress As IntPtr,   ' void*
    lpBuffer As IntPtr,   ' void* out
    nSize As UIntPtr,   ' UINT_PTR
    lpNumberOfBytesRead As IntPtr   ' UINT_PTR* optional, out
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' hProcess : HANDLE
' lpBaseAddress : void*
' lpBuffer : void* out
' nSize : UINT_PTR
' lpNumberOfBytesRead : UINT_PTR* optional, out
Declare PtrSafe Function ReadProcessMemory Lib "kernel32" ( _
    ByVal hProcess As LongPtr, _
    ByVal lpBaseAddress As LongPtr, _
    ByVal lpBuffer As LongPtr, _
    ByVal nSize As LongPtr, _
    ByVal lpNumberOfBytesRead As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

ReadProcessMemory = ctypes.windll.kernel32.ReadProcessMemory
ReadProcessMemory.restype = wintypes.BOOL
ReadProcessMemory.argtypes = [
    wintypes.HANDLE,  # hProcess : HANDLE
    ctypes.POINTER(None),  # lpBaseAddress : void*
    ctypes.POINTER(None),  # lpBuffer : void* out
    ctypes.c_size_t,  # nSize : UINT_PTR
    ctypes.POINTER(ctypes.c_size_t),  # lpNumberOfBytesRead : UINT_PTR* optional, out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
ReadProcessMemory = Fiddle::Function.new(
  lib['ReadProcessMemory'],
  [
    Fiddle::TYPE_VOIDP,  # hProcess : HANDLE
    Fiddle::TYPE_VOIDP,  # lpBaseAddress : void*
    Fiddle::TYPE_VOIDP,  # lpBuffer : void* out
    Fiddle::TYPE_UINTPTR_T,  # nSize : UINT_PTR
    Fiddle::TYPE_VOIDP,  # lpNumberOfBytesRead : UINT_PTR* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn ReadProcessMemory(
        hProcess: *mut core::ffi::c_void,  // HANDLE
        lpBaseAddress: *const (),  // void*
        lpBuffer: *mut (),  // void* out
        nSize: usize,  // UINT_PTR
        lpNumberOfBytesRead: *mut usize  // UINT_PTR* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool ReadProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, IntPtr lpBuffer, UIntPtr nSize, IntPtr lpNumberOfBytesRead);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_ReadProcessMemory' -Namespace Win32 -PassThru
# $api::ReadProcessMemory(hProcess, lpBaseAddress, lpBuffer, nSize, lpNumberOfBytesRead)

#uselib "KERNEL32.dll"
#func global ReadProcessMemory "ReadProcessMemory" sptr, sptr, sptr, sptr, sptr
; ReadProcessMemory hProcess, lpBaseAddress, lpBuffer, nSize, varptr(lpNumberOfBytesRead)   ; 戻り値は stat
; hProcess : HANDLE -> "sptr"
; lpBaseAddress : void* -> "sptr"
; lpBuffer : void* out -> "sptr"
; nSize : UINT_PTR -> "sptr"
; lpNumberOfBytesRead : UINT_PTR* optional, out -> "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。

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procReadProcessMemory = kernel32.NewProc("ReadProcessMemory")
)

// hProcess (HANDLE), lpBaseAddress (void*), lpBuffer (void* out), nSize (UINT_PTR), lpNumberOfBytesRead (UINT_PTR* optional, out)
r1, _, err := procReadProcessMemory.Call(
	uintptr(hProcess),
	uintptr(lpBaseAddress),
	uintptr(lpBuffer),
	uintptr(nSize),
	uintptr(lpNumberOfBytesRead),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function ReadProcessMemory(
  hProcess: THandle;   // HANDLE
  lpBaseAddress: Pointer;   // void*
  lpBuffer: Pointer;   // void* out
  nSize: NativeUInt;   // UINT_PTR
  lpNumberOfBytesRead: Pointer   // UINT_PTR* optional, out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'ReadProcessMemory';

result := DllCall("KERNEL32\ReadProcessMemory"
    , "Ptr", hProcess   ; HANDLE
    , "Ptr", lpBaseAddress   ; void*
    , "Ptr", lpBuffer   ; void* out
    , "UPtr", nSize   ; UINT_PTR
    , "Ptr", lpNumberOfBytesRead   ; UINT_PTR* optional, out
    , "Int")   ; return: BOOL

●ReadProcessMemory(hProcess, lpBaseAddress, lpBuffer, nSize, lpNumberOfBytesRead) = DLL("KERNEL32.dll", "bool ReadProcessMemory(void*, void*, void*, int, void*)")
# 呼び出し: ReadProcessMemory(hProcess, lpBaseAddress, lpBuffer, nSize, lpNumberOfBytesRead)
# hProcess : HANDLE -> "void*"
# lpBaseAddress : void* -> "void*"
# lpBuffer : void* out -> "void*"
# nSize : UINT_PTR -> "int"
# lpNumberOfBytesRead : UINT_PTR* optional, out -> "void*"
# 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 ReadProcessMemory(
    hProcess: ?*anyopaque, // HANDLE
    lpBaseAddress: ?*anyopaque, // void*
    lpBuffer: ?*anyopaque, // void* out
    nSize: usize, // UINT_PTR
    lpNumberOfBytesRead: [*c]usize // UINT_PTR* optional, out
) callconv(std.os.windows.WINAPI) i32;

proc ReadProcessMemory(
    hProcess: pointer,  # HANDLE
    lpBaseAddress: pointer,  # void*
    lpBuffer: pointer,  # void* out
    nSize: uint,  # UINT_PTR
    lpNumberOfBytesRead: ptr uint  # UINT_PTR* optional, out
): int32 {.importc: "ReadProcessMemory", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
int ReadProcessMemory(
    void* hProcess,   // HANDLE
    void* lpBaseAddress,   // void*
    void* lpBuffer,   // void* out
    size_t nSize,   // UINT_PTR
    size_t* lpNumberOfBytesRead   // UINT_PTR* optional, out
);

ccall((:ReadProcessMemory, "KERNEL32.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Ptr{Cvoid}, Ptr{Cvoid}, Csize_t, Ptr{Csize_t}),
      hProcess, lpBaseAddress, lpBuffer, nSize, lpNumberOfBytesRead)
# hProcess : HANDLE -> Ptr{Cvoid}
# lpBaseAddress : void* -> Ptr{Cvoid}
# lpBuffer : void* out -> Ptr{Cvoid}
# nSize : UINT_PTR -> Csize_t
# lpNumberOfBytesRead : UINT_PTR* optional, out -> Ptr{Csize_t}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t ReadProcessMemory(
    void* hProcess,
    void* lpBaseAddress,
    void* lpBuffer,
    uintptr_t nSize,
    uintptr_t* lpNumberOfBytesRead);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.ReadProcessMemory(hProcess, lpBaseAddress, lpBuffer, nSize, lpNumberOfBytesRead)
-- hProcess : HANDLE
-- lpBaseAddress : void*
-- lpBuffer : void* out
-- nSize : UINT_PTR
-- lpNumberOfBytesRead : UINT_PTR* optional, out
-- 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 ReadProcessMemory = lib.func('__stdcall', 'ReadProcessMemory', 'int32_t', ['void *', 'void *', 'void *', 'uintptr_t', 'uintptr_t *']);
// ReadProcessMemory(hProcess, lpBaseAddress, lpBuffer, nSize, lpNumberOfBytesRead)
// hProcess : HANDLE -> 'void *'
// lpBaseAddress : void* -> 'void *'
// lpBuffer : void* out -> 'void *'
// nSize : UINT_PTR -> 'uintptr_t'
// lpNumberOfBytesRead : UINT_PTR* optional, out -> '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", {
  ReadProcessMemory: { parameters: ["pointer", "pointer", "pointer", "usize", "pointer"], result: "i32" },
});
// lib.symbols.ReadProcessMemory(hProcess, lpBaseAddress, lpBuffer, nSize, lpNumberOfBytesRead)
// hProcess : HANDLE -> "pointer"
// lpBaseAddress : void* -> "pointer"
// lpBuffer : void* out -> "pointer"
// nSize : UINT_PTR -> "usize"
// lpNumberOfBytesRead : UINT_PTR* optional, out -> "pointer"
// 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
int32_t ReadProcessMemory(
    void* hProcess,
    void* lpBaseAddress,
    void* lpBuffer,
    size_t nSize,
    size_t* lpNumberOfBytesRead);
C, "KERNEL32.dll");
// $ffi->ReadProcessMemory(hProcess, lpBaseAddress, lpBuffer, nSize, lpNumberOfBytesRead);
// hProcess : HANDLE
// lpBaseAddress : void*
// lpBuffer : void* out
// nSize : UINT_PTR
// lpNumberOfBytesRead : UINT_PTR* optional, out
// 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);
    boolean ReadProcessMemory(
        Pointer hProcess,   // HANDLE
        Pointer lpBaseAddress,   // void*
        Pointer lpBuffer,   // void* out
        long nSize,   // UINT_PTR
        LongByReference lpNumberOfBytesRead   // UINT_PTR* optional, out
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun ReadProcessMemory = ReadProcessMemory(
    hProcess : Void*,   # HANDLE
    lpBaseAddress : Void*,   # void*
    lpBuffer : Void*,   # void* out
    nSize : LibC::SizeT,   # UINT_PTR
    lpNumberOfBytesRead : LibC::SizeT*   # UINT_PTR* optional, out
  ) : Int32
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 ReadProcessMemoryNative = Int32 Function(Pointer<Void>, Pointer<Void>, Pointer<Void>, UintPtr, Pointer<UintPtr>);
typedef ReadProcessMemoryDart = int Function(Pointer<Void>, Pointer<Void>, Pointer<Void>, int, Pointer<UintPtr>);
final ReadProcessMemory = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<ReadProcessMemoryNative, ReadProcessMemoryDart>('ReadProcessMemory');
// hProcess : HANDLE -> Pointer<Void>
// lpBaseAddress : void* -> Pointer<Void>
// lpBuffer : void* out -> Pointer<Void>
// nSize : UINT_PTR -> UintPtr
// lpNumberOfBytesRead : UINT_PTR* optional, out -> Pointer<UintPtr>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function ReadProcessMemory(
  hProcess: THandle;   // HANDLE
  lpBaseAddress: Pointer;   // void*
  lpBuffer: Pointer;   // void* out
  nSize: NativeUInt;   // UINT_PTR
  lpNumberOfBytesRead: Pointer   // UINT_PTR* optional, out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'ReadProcessMemory';

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

foreign import stdcall safe "ReadProcessMemory"
  c_ReadProcessMemory :: Ptr () -> Ptr () -> Ptr () -> CUIntPtr -> Ptr CUIntPtr -> IO CInt
-- hProcess : HANDLE -> Ptr ()
-- lpBaseAddress : void* -> Ptr ()
-- lpBuffer : void* out -> Ptr ()
-- nSize : UINT_PTR -> CUIntPtr
-- lpNumberOfBytesRead : UINT_PTR* optional, out -> 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 readprocessmemory =
  foreign "ReadProcessMemory"
    ((ptr void) @-> (ptr void) @-> (ptr void) @-> size_t @-> (ptr size_t) @-> returning int32_t)
(* hProcess : HANDLE -> (ptr void) *)
(* lpBaseAddress : void* -> (ptr void) *)
(* lpBuffer : void* out -> (ptr void) *)
(* nSize : UINT_PTR -> size_t *)
(* lpNumberOfBytesRead : UINT_PTR* optional, out -> (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 ("ReadProcessMemory" read-process-memory :convention :stdcall) :int32
  (h-process :pointer)   ; HANDLE
  (lp-base-address :pointer)   ; void*
  (lp-buffer :pointer)   ; void* out
  (n-size :uint64)   ; UINT_PTR
  (lp-number-of-bytes-read :pointer))   ; UINT_PTR* optional, out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $ReadProcessMemory = Win32::API::More->new('KERNEL32',
    'BOOL ReadProcessMemory(HANDLE hProcess, LPVOID lpBaseAddress, LPVOID lpBuffer, WPARAM nSize, LPVOID lpNumberOfBytesRead)');
# my $ret = $ReadProcessMemory->Call($hProcess, $lpBaseAddress, $lpBuffer, $nSize, $lpNumberOfBytesRead);
# hProcess : HANDLE -> HANDLE
# lpBaseAddress : void* -> LPVOID
# lpBuffer : void* out -> LPVOID
# nSize : UINT_PTR -> WPARAM
# lpNumberOfBytesRead : UINT_PTR* optional, out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。