OpenProcess

関数

指定プロセスIDの既存プロセスを開いてハンドルを取得する。

DLLKERNEL32.dll呼出規約winapiSetLastErrorあり対応OSWindows XP 以降

シグネチャ

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

HANDLE OpenProcess(
    PROCESS_ACCESS_RIGHTS dwDesiredAccess,
    BOOL bInheritHandle,
    DWORD dwProcessId
);

パラメーター

名前	型	方向
dwDesiredAccess	PROCESS_ACCESS_RIGHTS	in
bInheritHandle	BOOL	in
dwProcessId	DWORD	in

戻り値の型: HANDLE

各言語での呼び出し定義

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

HANDLE OpenProcess(
    PROCESS_ACCESS_RIGHTS dwDesiredAccess,
    BOOL bInheritHandle,
    DWORD dwProcessId
);

[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern IntPtr OpenProcess(
    uint dwDesiredAccess,   // PROCESS_ACCESS_RIGHTS
    bool bInheritHandle,   // BOOL
    uint dwProcessId   // DWORD
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function OpenProcess(
    dwDesiredAccess As UInteger,   ' PROCESS_ACCESS_RIGHTS
    bInheritHandle As Boolean,   ' BOOL
    dwProcessId As UInteger   ' DWORD
) As IntPtr
End Function

' dwDesiredAccess : PROCESS_ACCESS_RIGHTS
' bInheritHandle : BOOL
' dwProcessId : DWORD
Declare PtrSafe Function OpenProcess Lib "kernel32" ( _
    ByVal dwDesiredAccess As Long, _
    ByVal bInheritHandle As Long, _
    ByVal dwProcessId 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

OpenProcess = ctypes.windll.kernel32.OpenProcess
OpenProcess.restype = ctypes.c_void_p
OpenProcess.argtypes = [
    wintypes.DWORD,  # dwDesiredAccess : PROCESS_ACCESS_RIGHTS
    wintypes.BOOL,  # bInheritHandle : BOOL
    wintypes.DWORD,  # dwProcessId : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
OpenProcess = Fiddle::Function.new(
  lib['OpenProcess'],
  [
    -Fiddle::TYPE_INT,  # dwDesiredAccess : PROCESS_ACCESS_RIGHTS
    Fiddle::TYPE_INT,  # bInheritHandle : BOOL
    -Fiddle::TYPE_INT,  # dwProcessId : DWORD
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "kernel32")]
extern "system" {
    fn OpenProcess(
        dwDesiredAccess: u32,  // PROCESS_ACCESS_RIGHTS
        bInheritHandle: i32,  // BOOL
        dwProcessId: u32  // DWORD
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern IntPtr OpenProcess(uint dwDesiredAccess, bool bInheritHandle, uint dwProcessId);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_OpenProcess' -Namespace Win32 -PassThru
# $api::OpenProcess(dwDesiredAccess, bInheritHandle, dwProcessId)

#uselib "KERNEL32.dll"
#func global OpenProcess "OpenProcess" sptr, sptr, sptr
; OpenProcess dwDesiredAccess, bInheritHandle, dwProcessId   ; 戻り値は stat
; dwDesiredAccess : PROCESS_ACCESS_RIGHTS -> "sptr"
; bInheritHandle : BOOL -> "sptr"
; dwProcessId : 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 OpenProcess "OpenProcess" int, int, int
; res = OpenProcess(dwDesiredAccess, bInheritHandle, dwProcessId)
; dwDesiredAccess : PROCESS_ACCESS_RIGHTS -> "int"
; bInheritHandle : BOOL -> "int"
; dwProcessId : DWORD -> "int"

; HANDLE OpenProcess(PROCESS_ACCESS_RIGHTS dwDesiredAccess, BOOL bInheritHandle, DWORD dwProcessId)
#uselib "KERNEL32.dll"
#cfunc global OpenProcess "OpenProcess" int, int, int
; res = OpenProcess(dwDesiredAccess, bInheritHandle, dwProcessId)
; dwDesiredAccess : PROCESS_ACCESS_RIGHTS -> "int"
; bInheritHandle : BOOL -> "int"
; dwProcessId : DWORD -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procOpenProcess = kernel32.NewProc("OpenProcess")
)

// dwDesiredAccess (PROCESS_ACCESS_RIGHTS), bInheritHandle (BOOL), dwProcessId (DWORD)
r1, _, err := procOpenProcess.Call(
	uintptr(dwDesiredAccess),
	uintptr(bInheritHandle),
	uintptr(dwProcessId),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HANDLE

function OpenProcess(
  dwDesiredAccess: DWORD;   // PROCESS_ACCESS_RIGHTS
  bInheritHandle: BOOL;   // BOOL
  dwProcessId: DWORD   // DWORD
): THandle; stdcall;
  external 'KERNEL32.dll' name 'OpenProcess';

result := DllCall("KERNEL32\OpenProcess"
    , "UInt", dwDesiredAccess   ; PROCESS_ACCESS_RIGHTS
    , "Int", bInheritHandle   ; BOOL
    , "UInt", dwProcessId   ; DWORD
    , "Ptr")   ; return: HANDLE

●OpenProcess(dwDesiredAccess, bInheritHandle, dwProcessId) = DLL("KERNEL32.dll", "void* OpenProcess(dword, bool, dword)")
# 呼び出し: OpenProcess(dwDesiredAccess, bInheritHandle, dwProcessId)
# dwDesiredAccess : PROCESS_ACCESS_RIGHTS -> "dword"
# bInheritHandle : BOOL -> "bool"
# dwProcessId : 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)。