Toolhelp32ReadProcessMemory

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

BOOL Toolhelp32ReadProcessMemory(
    DWORD th32ProcessID,
    const void* lpBaseAddress,
    void* lpBuffer,
    UINT_PTR cbRead,
    UINT_PTR* lpNumberOfBytesRead
);

<DllImport("KERNEL32.dll", ExactSpelling:=True)>
Public Shared Function Toolhelp32ReadProcessMemory(
    th32ProcessID As UInteger,   ' DWORD
    lpBaseAddress As IntPtr,   ' void*
    lpBuffer As IntPtr,   ' void* in/out
    cbRead As UIntPtr,   ' UINT_PTR
    ByRef lpNumberOfBytesRead As UIntPtr   ' UINT_PTR* in/out
) As Boolean
End Function

' th32ProcessID : DWORD
' lpBaseAddress : void*
' lpBuffer : void* in/out
' cbRead : UINT_PTR
' lpNumberOfBytesRead : UINT_PTR* in/out
Declare PtrSafe Function Toolhelp32ReadProcessMemory Lib "kernel32" ( _
    ByVal th32ProcessID As Long, _
    ByVal lpBaseAddress As LongPtr, _
    ByVal lpBuffer As LongPtr, _
    ByVal cbRead As LongPtr, _
    ByRef 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

Toolhelp32ReadProcessMemory = ctypes.windll.kernel32.Toolhelp32ReadProcessMemory
Toolhelp32ReadProcessMemory.restype = wintypes.BOOL
Toolhelp32ReadProcessMemory.argtypes = [
    wintypes.DWORD,  # th32ProcessID : DWORD
    ctypes.POINTER(None),  # lpBaseAddress : void*
    ctypes.POINTER(None),  # lpBuffer : void* in/out
    ctypes.c_size_t,  # cbRead : UINT_PTR
    ctypes.POINTER(ctypes.c_size_t),  # lpNumberOfBytesRead : UINT_PTR* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
Toolhelp32ReadProcessMemory = Fiddle::Function.new(
  lib['Toolhelp32ReadProcessMemory'],
  [
    -Fiddle::TYPE_INT,  # th32ProcessID : DWORD
    Fiddle::TYPE_VOIDP,  # lpBaseAddress : void*
    Fiddle::TYPE_VOIDP,  # lpBuffer : void* in/out
    Fiddle::TYPE_UINTPTR_T,  # cbRead : UINT_PTR
    Fiddle::TYPE_VOIDP,  # lpNumberOfBytesRead : UINT_PTR* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn Toolhelp32ReadProcessMemory(
        th32ProcessID: u32,  // DWORD
        lpBaseAddress: *const (),  // void*
        lpBuffer: *mut (),  // void* in/out
        cbRead: usize,  // UINT_PTR
        lpNumberOfBytesRead: *mut usize  // UINT_PTR* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll")]
public static extern bool Toolhelp32ReadProcessMemory(uint th32ProcessID, IntPtr lpBaseAddress, IntPtr lpBuffer, UIntPtr cbRead, ref UIntPtr lpNumberOfBytesRead);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_Toolhelp32ReadProcessMemory' -Namespace Win32 -PassThru
# $api::Toolhelp32ReadProcessMemory(th32ProcessID, lpBaseAddress, lpBuffer, cbRead, lpNumberOfBytesRead)

#uselib "KERNEL32.dll"
#func global Toolhelp32ReadProcessMemory "Toolhelp32ReadProcessMemory" sptr, sptr, sptr, sptr, sptr
; Toolhelp32ReadProcessMemory th32ProcessID, lpBaseAddress, lpBuffer, cbRead, varptr(lpNumberOfBytesRead)   ; 戻り値は stat
; th32ProcessID : DWORD -> "sptr"
; lpBaseAddress : void* -> "sptr"
; lpBuffer : void* in/out -> "sptr"
; cbRead : UINT_PTR -> "sptr"
; lpNumberOfBytesRead : UINT_PTR* in/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。

#uselib "KERNEL32.dll"
#cfunc global Toolhelp32ReadProcessMemory "Toolhelp32ReadProcessMemory" int, sptr, sptr, sptr, var
; res = Toolhelp32ReadProcessMemory(th32ProcessID, lpBaseAddress, lpBuffer, cbRead, lpNumberOfBytesRead)
; th32ProcessID : DWORD -> "int"
; lpBaseAddress : void* -> "sptr"
; lpBuffer : void* in/out -> "sptr"
; cbRead : UINT_PTR -> "sptr"
; lpNumberOfBytesRead : UINT_PTR* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; BOOL Toolhelp32ReadProcessMemory(DWORD th32ProcessID, void* lpBaseAddress, void* lpBuffer, UINT_PTR cbRead, UINT_PTR* lpNumberOfBytesRead)
#uselib "KERNEL32.dll"
#cfunc global Toolhelp32ReadProcessMemory "Toolhelp32ReadProcessMemory" int, intptr, intptr, intptr, var
; res = Toolhelp32ReadProcessMemory(th32ProcessID, lpBaseAddress, lpBuffer, cbRead, lpNumberOfBytesRead)
; th32ProcessID : DWORD -> "int"
; lpBaseAddress : void* -> "intptr"
; lpBuffer : void* in/out -> "intptr"
; cbRead : UINT_PTR -> "intptr"
; lpNumberOfBytesRead : UINT_PTR* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procToolhelp32ReadProcessMemory = kernel32.NewProc("Toolhelp32ReadProcessMemory")
)

// th32ProcessID (DWORD), lpBaseAddress (void*), lpBuffer (void* in/out), cbRead (UINT_PTR), lpNumberOfBytesRead (UINT_PTR* in/out)
r1, _, err := procToolhelp32ReadProcessMemory.Call(
	uintptr(th32ProcessID),
	uintptr(lpBaseAddress),
	uintptr(lpBuffer),
	uintptr(cbRead),
	uintptr(lpNumberOfBytesRead),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function Toolhelp32ReadProcessMemory(
  th32ProcessID: DWORD;   // DWORD
  lpBaseAddress: Pointer;   // void*
  lpBuffer: Pointer;   // void* in/out
  cbRead: NativeUInt;   // UINT_PTR
  lpNumberOfBytesRead: Pointer   // UINT_PTR* in/out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'Toolhelp32ReadProcessMemory';

result := DllCall("KERNEL32\Toolhelp32ReadProcessMemory"
    , "UInt", th32ProcessID   ; DWORD
    , "Ptr", lpBaseAddress   ; void*
    , "Ptr", lpBuffer   ; void* in/out
    , "UPtr", cbRead   ; UINT_PTR
    , "Ptr", lpNumberOfBytesRead   ; UINT_PTR* in/out
    , "Int")   ; return: BOOL

●Toolhelp32ReadProcessMemory(th32ProcessID, lpBaseAddress, lpBuffer, cbRead, lpNumberOfBytesRead) = DLL("KERNEL32.dll", "bool Toolhelp32ReadProcessMemory(dword, void*, void*, int, void*)")
# 呼び出し: Toolhelp32ReadProcessMemory(th32ProcessID, lpBaseAddress, lpBuffer, cbRead, lpNumberOfBytesRead)
# th32ProcessID : DWORD -> "dword"
# lpBaseAddress : void* -> "void*"
# lpBuffer : void* in/out -> "void*"
# cbRead : UINT_PTR -> "int"
# lpNumberOfBytesRead : UINT_PTR* in/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)。