using System;
using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Runtime.InteropServices;namespace WindowsApplication1{ public partial class AutoDeleteMessageBox : Form { [DllImport("user32.dll", EntryPoint
= "FindWindow",
CharSet = CharSet.Auto)] private extern static IntPtr
FindWindow(string lpClassName,
string lpWindowName); [DllImport("user32.dll", CharSet =
CharSet.Auto)] public static extern int PostMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam); public const int WM_CLOSE =
0x10; public AutoDeleteMessageBox() { InitializeComponent(); } private void button1_Click(object sender,
EventArgs e) { StartKiller(); MessageBox.Show("3秒钟后自动关闭MessageBox窗口",
"MessageBox"); } private void StartKiller() { Timer timer = new Timer(); timer.Interval = 3000; //3秒启动 timer.Tick += new EventHandler(Timer_Tick); timer.Start(); } private void Timer_Tick(object sender,
EventArgs e) { KillMessageBox(); //停止Timer ((Timer)sender).Stop(); } private void KillMessageBox() { //按照MessageBox的标题，找到MessageBox的窗口 IntPtr ptr = FindWindow(null, "MessageBox"); if (ptr !=
IntPtr.Zero) { //找到则关闭MessageBox窗口 PostMessage(ptr, WM_CLOSE, IntPtr.Zero,
IntPtr.Zero); } } }}winform messagebox自动关闭,布布扣,bubuko.com
原文：http://www.cnblogs.com/jearay/p/3620260.html