c# winform 自动关闭messagebox 模拟回车

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); } } } }