C#窗体MessageBox显示自动消失(移动开发Pocket PC 2003)

MessageBox提示框一般需要手动关闭，对于简单的信息提示，每次还要去关闭很麻烦。于是想到怎样能让MessageBox显示一段时间后自动关闭。虽然知道这肯定要用到定时器之类的，由于知识所限，最终没能够解决，于是求助袁小萍师姐，师姐就是师姐啊，不用太多时间就搞定了~，下面是代码：

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace pdaTraceInfoPlat.beans
{
    class MessageBoxTimeOut
    {
        private string _caption;

        public void Show(string text, string caption, int timeout)
        {
            this._caption = caption;
            StartTimer(timeout);
            MessageBox.Show(text, caption);
        }

        private void StartTimer(int interval)
        {
            Timer timer = new Timer();
            timer.Interval = interval;
            timer.Tick += new EventHandler(Timer_Tick);
            timer.Enabled = true;
        }

        private void Timer_Tick(object sender, EventArgs e)
        {
            KillMessageBox();
            //停止计时器
            ((Timer)sender).Enabled = false;
        }

        [DllImport("coredll.dll", EntryPoint = "FindWindow", CharSet = CharSet.Auto)]
        private extern static IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("coredll.dll", CharSet = CharSet.Auto)]
        public static extern int PostMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);

        public const int WM_CLOSE = 0x10;

        private void KillMessageBox()
        {
            //查找MessageBox的弹出窗口,注意对应标题
            IntPtr ptr = FindWindow(null, this._caption);
            if (ptr != IntPtr.Zero)
            {
                //查找到窗口则关闭
                PostMessage(ptr, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
            }
        }       
    }
}