OpenProcess

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

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

<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)。

const std = @import("std");

extern "kernel32" fn OpenProcess(
    dwDesiredAccess: u32, // PROCESS_ACCESS_RIGHTS
    bInheritHandle: i32, // BOOL
    dwProcessId: u32 // DWORD
) callconv(std.os.windows.WINAPI) ?*anyopaque;

proc OpenProcess(
    dwDesiredAccess: uint32,  # PROCESS_ACCESS_RIGHTS
    bInheritHandle: int32,  # BOOL
    dwProcessId: uint32  # DWORD
): pointer {.importc: "OpenProcess", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
void* OpenProcess(
    uint dwDesiredAccess,   // PROCESS_ACCESS_RIGHTS
    int bInheritHandle,   // BOOL
    uint dwProcessId   // DWORD
);

ccall((:OpenProcess, "KERNEL32.dll"), stdcall, Ptr{Cvoid},
      (UInt32, Int32, UInt32),
      dwDesiredAccess, bInheritHandle, dwProcessId)
# dwDesiredAccess : PROCESS_ACCESS_RIGHTS -> UInt32
# bInheritHandle : BOOL -> Int32
# dwProcessId : DWORD -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void* OpenProcess(
    uint32_t dwDesiredAccess,
    int32_t bInheritHandle,
    uint32_t dwProcessId);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.OpenProcess(dwDesiredAccess, bInheritHandle, dwProcessId)
-- dwDesiredAccess : PROCESS_ACCESS_RIGHTS
-- bInheritHandle : BOOL
-- dwProcessId : DWORD
-- 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 OpenProcess = lib.func('__stdcall', 'OpenProcess', 'void *', ['uint32_t', 'int32_t', 'uint32_t']);
// OpenProcess(dwDesiredAccess, bInheritHandle, dwProcessId)
// dwDesiredAccess : PROCESS_ACCESS_RIGHTS -> 'uint32_t'
// bInheritHandle : BOOL -> 'int32_t'
// dwProcessId : DWORD -> '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", {
  OpenProcess: { parameters: ["u32", "i32", "u32"], result: "pointer" },
});
// lib.symbols.OpenProcess(dwDesiredAccess, bInheritHandle, dwProcessId)
// dwDesiredAccess : PROCESS_ACCESS_RIGHTS -> "u32"
// bInheritHandle : BOOL -> "i32"
// dwProcessId : DWORD -> "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* OpenProcess(
    uint32_t dwDesiredAccess,
    int32_t bInheritHandle,
    uint32_t dwProcessId);
C, "KERNEL32.dll");
// $ffi->OpenProcess(dwDesiredAccess, bInheritHandle, dwProcessId);
// dwDesiredAccess : PROCESS_ACCESS_RIGHTS
// bInheritHandle : BOOL
// dwProcessId : DWORD
// 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 OpenProcess(
        int dwDesiredAccess,   // PROCESS_ACCESS_RIGHTS
        boolean bInheritHandle,   // BOOL
        int dwProcessId   // DWORD
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun OpenProcess = OpenProcess(
    dwDesiredAccess : UInt32,   # PROCESS_ACCESS_RIGHTS
    bInheritHandle : Int32,   # BOOL
    dwProcessId : UInt32   # DWORD
  ) : 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 OpenProcessNative = Pointer<Void> Function(Uint32, Int32, Uint32);
typedef OpenProcessDart = Pointer<Void> Function(int, int, int);
final OpenProcess = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<OpenProcessNative, OpenProcessDart>('OpenProcess');
// dwDesiredAccess : PROCESS_ACCESS_RIGHTS -> Uint32
// bInheritHandle : BOOL -> Int32
// dwProcessId : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function OpenProcess(
  dwDesiredAccess: DWORD;   // PROCESS_ACCESS_RIGHTS
  bInheritHandle: BOOL;   // BOOL
  dwProcessId: DWORD   // DWORD
): THandle; stdcall;
  external 'KERNEL32.dll' name 'OpenProcess';

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

foreign import stdcall safe "OpenProcess"
  c_OpenProcess :: Word32 -> CInt -> Word32 -> IO (Ptr ())
-- dwDesiredAccess : PROCESS_ACCESS_RIGHTS -> Word32
-- bInheritHandle : BOOL -> CInt
-- dwProcessId : DWORD -> 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 openprocess =
  foreign "OpenProcess"
    (uint32_t @-> int32_t @-> uint32_t @-> returning (ptr void))
(* dwDesiredAccess : PROCESS_ACCESS_RIGHTS -> uint32_t *)
(* bInheritHandle : BOOL -> int32_t *)
(* dwProcessId : DWORD -> 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 ("OpenProcess" open-process :convention :stdcall) :pointer
  (dw-desired-access :uint32)   ; PROCESS_ACCESS_RIGHTS
  (b-inherit-handle :int32)   ; BOOL
  (dw-process-id :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $OpenProcess = Win32::API::More->new('KERNEL32',
    'HANDLE OpenProcess(DWORD dwDesiredAccess, BOOL bInheritHandle, DWORD dwProcessId)');
# my $ret = $OpenProcess->Call($dwDesiredAccess, $bInheritHandle, $dwProcessId);
# dwDesiredAccess : PROCESS_ACCESS_RIGHTS -> DWORD
# bInheritHandle : BOOL -> BOOL
# dwProcessId : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。