unity后台运行状态下获取键盘输入

unity后台运行状态下获取键盘输入

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;public class jingJue : MonoBehaviour {//截获按钮private const int WH_KEYBOARD_LL = 13;private const int WM_KEYDOWN = 0x0100;private static LowLevelKeyboardProc _proc = HookCallback;private static IntPtr _hookID = IntPtr.Zero;// Use this for initializationvoid Start () {   _hookID = SetHook(_proc);}void OnApplicationQuit(){      UnhookWindowsHookEx(_hookID);}private static IntPtr SetHook(LowLevelKeyboardProc proc){using (Process curProcess = Process.GetCurrentProcess())using (ProcessModule curModule = curProcess.MainModule){return SetWindowsHookEx(WH_KEYBOARD_LL, proc, GetModuleHandle(curModule.ModuleName), 0);}}private delegate IntPtr