Unity -怎么通过代码来实现控制打开和关闭外部程序呢？

//最近有一个想法，就是控制微信打开和关闭并且群发消息。。。嘿嘿

using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Runtime.InteropServices;
using UnityEngine;
using UnityEngine.UI;
 
 
public class BtnCtr : MonoBehaviour
{
 
    [DllImport("User32.dll", EntryPoint = "FindWindow")]
    public extern static IntPtr FindWindow(string lpClassName, string lpWindowName);
 
    [DllImport("User32.dll", EntryPoint = "FindWindowEx")]
    public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpClassName, string lpWindowName);
 
    public void btn4()
    {
 
        // IntPtr maindHwnd = FindWindow( "WeChatLoginWndForPC", null); //获得微信登陆框的句柄   
        IntPtr maindHwnd = FindWindow("WeChatMainWndForPC", null); //获得微信登陆框的句柄   
        if (maindHwnd != IntPtr.Zero)
        {
            Process[] ps = Process.GetProcessesByName("WeChat");
            if (ps != null)
            {
                foreach (Process p in ps)
                {
                    p.Kill();
                }
            }
        }
        else
        {
            Process p = new Process();
            p.StartInfo.FileName = @"D:\WeiChat\WeChat\WeChat.exe";
            p.Start();
 
        }
    }
 
    public void btn5()
    {
 
        IntPtr maindHwnd = FindWindow(null, "TIM"); //获得Tim登陆框的句柄   
        if (maindHwnd != IntPtr.Zero)
        {
            Process[] ps = Process.GetProcessesByName("TIM");
            if (ps != null)
            {
                foreach (Process p in ps)
                {
 
                    p.Kill();
                }
            }
        }
        else
        {
            Process p = new Process();
            p.StartInfo.FileName = @"D:\Tim\Bin\QQScLauncher.exe";
            p.Start();
 
        }
 
    }
 
    public void btn6()
    {
        IntPtr maindHwnd = FindWindow("MSPaintApp", null); //获得电脑画板登陆框的句柄   
        if (maindHwnd != IntPtr.Zero)
        {
            Process[] ps = Process.GetProcessesByName("mspaint");
            if (ps != null)
            {
                foreach (Process p in ps)
                {
                    p.Kill();
                }
            }
        }
        else
        {
            Process p = new Process();
            p.StartInfo.FileName = @"C:\WINDOWS\system32\mspaint.exe"; // 电脑自带的画图软件
            p.Start();
 
        }
 
 
    }
    static void LaunchCommandLineApp()
    {
        Process process = new Process();
        process.StartInfo.FileName = "cmd.exe";
        process.StartInfo.Arguments = "/c" + "start D:/Tim/Bin/QQScLauncher.exe";
        process.StartInfo.UseShellExecute = false;   //是否使用操作系统shell启动 
        process.StartInfo.CreateNoWindow = false;   //是否在新窗口中启动该进程的值 (不显示程序窗口)
        process.Start();
        process.WaitForExit();  //等待程序执行完退出进程
        process.Close();
    }
 
}