在C#中自动关闭消息框

using System;
using System.Windows.Forms;

namespace AutoCloseMessageBox
{
    public static class MessageBoxAutoClose
    {
        public static void Show(string message, string caption, int timeout)
        {
            Timer timer = new Timer();
            timer.Interval = timeout;
            timer.Tick += (sender, e) =>
            {
                timer.Stop();
                IntPtr mbWnd = FindWindow(null, caption);
                if (mbWnd != IntPtr.Zero)
                {
                    SendMessage(mbWnd, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
                }
            };
            timer.Start();

            MessageBox.Show(message, caption);
        }

        [System.Runtime.InteropServices.DllImport("user32.dll", SetLastError = true)]
        private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        [System.Runtime.InteropServices.DllImport("user32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto)]
        private static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);

        private const UInt32 WM_CLOSE = 0x0010;
    }

    public class Program
    {
        static void Main(string[] args)
        {
            MessageBoxAutoClose.Show("This message box will automatically close in 5 seconds.", "Auto Close", 5000);
        }
    }
}