C#实现自动关闭消息框

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Threading;
using System.Diagnostics;

namespace AutomaticCloseMessageBox
{
  
    public class MessageBoxHelper
        {
            /// <summary>
            /// 查找窗口
            /// </summary>
            /// <param name="hwnd">窗口句柄</param>
            /// <param name="title">窗口标题</param>
            /// <returns></returns>
            [DllImport("user32.dll", CharSet = CharSet.Auto)]
            static extern IntPtr FindWindow(IntPtr hwnd, string title);

            /// <summary>
            /// 移动窗口
            /// </summary>
            /// <param name="hwnd">窗口句柄</param>
            /// <param name="x">起始位置X</param>
            /// <param name="y">起始位置Y</param>
            /// <param name="nWidth">窗口宽度</param>
            /// <param name="nHeight">窗口高度</param>
            /// <param name="rePaint">是否重绘</param>
            [DllImport("user32.dll", CharSet = CharSet.Auto)]
            static extern void MoveWindow(IntPtr hwnd, int x, int y, int nWidth, int nHeight, bool rePaint);

            /// <summary>
            /// 获取窗口矩形
            /// </summary>
            /// <param name="hwnd">窗口句柄</param>
            /// <param name="rect"></param>
            /// <returns></returns>
            [DllImport("user32.dll", CharSet = CharSet.Auto)]
            static extern bool GetWindowRect(IntPtr hwnd, out Rectangle rect);

            /// <summary>
            /// 向窗口发送信息
            /// </summary>
            /// <param name="hwnd">窗口句柄</param>
            /// <param name="msg">信息</param>
            /// <param name="wParam">高字节</param>
            /// <param name="lParam">低字节</param>
            /// <returns></returns>
            [DllImport("user32.dll", CharSet = CharSet.Auto)]
            static extern int PostMessage(IntPtr hwnd, int msg, uint wParam, uint lParam);

            public const int WM_CLOSE = 0x10; //关闭命令

            public const int WM_KEYDOWN = 0x0100;//按下键

            public const int WM_KEYUP = 0x0101;//按键起来

            public const int VK_RETURN = 0x0D;//回车键

            public static bool IsWorking = false;

            /// <summary>
            /// 对话框标题
            /// </summary>
            public static string[] titles = new string[4] { "请选择", "提示", "错误", "警告" };


   
            /// <summary>
            /// 查找和移动窗口
            /// </summary>
            /// <param name="title">窗口标题</param>
            /// <param name="x">起始位置X</param>
            /// <param name="y">起始位置Y</param>
            public static void FindAndMoveWindow(string title, int x, int y)
            {
                Thread t = new Thread(() =>
                {
                    IntPtr msgBox = IntPtr.Zero;
                    while ((msgBox = FindWindow(IntPtr.Zero, title)) == IntPtr.Zero) ;
                    Rectangle r = new Rectangle();
                    GetWindowRect(msgBox, out r);
                    MoveWindow(msgBox, x, y, r.Width - r.X, r.Height - r.Y, true);
                });
                t.Start();
            }

            /// <summary>
            /// 查找和关闭窗口
            /// </summary>
            /// <param name="title">标题</param>
            public static void FindAndKillWindow(string title)
            {
                IntPtr ptr = FindWindow(IntPtr.Zero, title);
                if (ptr != IntPtr.Zero)
                {
                    int ret = PostMessage(ptr, WM_CLOSE, 0, 0);
                    Thread.Sleep(1000);
                    ptr = FindWindow(IntPtr.Zero, title);
                    if (ptr != IntPtr.Zero)
                    {
                        PostMessage(ptr, WM_KEYDOWN, VK_RETURN, 0);
                        PostMessage(ptr, WM_KEYUP, VK_RETURN, 0);
                    }
                }
            }

            /// <summary>
            /// 查找和关闭窗口
            /// </summary>
            public static void FindAndKillWindow()
            {
                Thread t = new Thread(() =>
                {
                    while (IsWorking)
                    {
                        //按标题查找
                        foreach (string title in titles)
                        {
                            FindAndKillWindow(title);
                        }
                        Thread.Sleep(3000);
                    }
                });
                t.Start();
            }
        }
    }