winform弹出框（MessageBox支持自动关闭）

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

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1（）
        {
            InitializeComponent（）;
        }

       
        [DllImport（“user32.dll“ EntryPoint = “FindWindow“）]
        private static extern IntPtr FindWindow（string IpClassName string IpWindowName）;
        [DllImport（“User32.dll“ CharSet = CharSet.Auto）]
        public static extern int SetWindowText（IntPtr hWnd string text）;

        [DllImport（“user32.dll“ EntryPoint = “FindWindowEx“）]
        private static extern IntPtr

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2019-11-30 20:55  WindowsFormsApplication1\
     目录           0  2019-12-13 09:34  WindowsFormsApplication1\WindowsFormsApplication1\
     文件         914  2019-11-30 20:55  WindowsFormsApplication1\WindowsFormsApplication1.sln
     文件       21504  2019-12-13 15:00  WindowsFormsApplication1\WindowsFormsApplication1.suo
     目录           0  2019-11-30 20:55  WindowsFormsApplication1\WindowsFormsApplication1\bin\
     目录           0  2019-11-30 21:04  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\
     文件     1534464  2019-11-25 14:16  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\NetDimension.NanUI.dll
     文件       11776  2019-12-18 10:21  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.exe
     文件       28160  2019-12-18 10:21  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.pdb
     文件       11600  2019-12-18 10:22  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.vshost.exe
     文件         490  2010-03-17 22:39  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.vshost.exe.manifest
     文件        6634  2019-12-13 15:00  WindowsFormsApplication1\WindowsFormsApplication1\Form1.cs
     文件        4286  2019-12-13 10:35  WindowsFormsApplication1\WindowsFormsApplication1\Form1.Designer.cs
     文件        6011  2019-12-13 10:35  WindowsFormsApplication1\WindowsFormsApplication1\Form1.resx
     目录           0  2019-11-30 20:55  WindowsFormsApplication1\WindowsFormsApplication1\obj\
     目录           0  2019-11-30 20:55  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\
     目录           0  2019-12-18 10:21  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\
     文件        5420  2019-12-13 09:30  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache
     文件        6490  2019-12-18 10:21  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     目录           0  2019-11-30 20:55  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\TempPE\
     文件         970  2019-12-18 10:22  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\WindowsFormsApplication1.csproj.FileListAbsolute.txt
     文件         975  2019-12-13 10:35  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\WindowsFormsApplication1.csproj.GenerateResource.Cache
     文件       13634  2019-12-13 09:30  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\WindowsFormsApplication1.csprojResolveAssemblyReference.cache
     文件       11776  2019-12-18 10:21  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\WindowsFormsApplication1.exe
     文件         180  2019-12-13 10:35  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\WindowsFormsApplication1.Form1.resources
     文件       28160  2019-12-18 10:21  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\WindowsFormsApplication1.pdb
     文件         180  2019-12-13 09:35  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\WindowsFormsApplication1.Properties.Resources.resources
     文件         536  2019-11-30 21:04  WindowsFormsApplication1\WindowsFormsApplication1\Program.cs
     目录           0  2019-11-30 20:55  WindowsFormsApplication1\WindowsFormsApplication1\Properties\
     文件        1398  2019-11-30 20:55  WindowsFormsApplication1\WindowsFormsApplication1\Properties\AssemblyInfo.cs
     文件        2900  2019-11-30 20:55  WindowsFormsApplication1\WindowsFormsApplication1\Properties\Resources.Designer.cs
............此处省略4个文件信息