自动关闭Messbox

  /// <summary>
    /// 自动关闭Messbox
    /// </summary>
    public class MessageBoxAutoClose
    {
        System.Threading.Timer _timeoutTimer;
        string _caption;
        public MessageBoxAutoClose(string text, string caption, int timeout)
        {
            _caption = caption;
            _timeoutTimer = new System.Threading.Timer(OnTimerElapsed,
                null, timeout, System.Threading.Timeout.Infinite);
            MessageBox.Show(text, caption);
        }
        public MessageBoxAutoClose(string text, string caption, MessageBoxButtons msgButton, int timeout)
        {
            _caption = caption;
            _timeoutTimer = new System.Threading.Timer(OnTimerElapsed,
                null, timeout, System.Threading.Timeout.Infinite);
            MessageBox.Show(text, caption, msgButton);
        }

        public MessageBoxAutoClose(string text, string caption, MessageBoxButtons msgButton, MessageBoxIcon msgIcon, int timeout)
        {
            _caption = caption;
            _timeoutTimer = new System.Threading.Timer(OnTimerElapsed,
                null, timeout, System.Threading.Timeout.Infinite);
            MessageBox.Show(text, caption, msgButton, msgIcon);
        }

        /// <summary>
        /// 提示关闭
        /// </summary>
        /// <param name="text">显示提示内容</param>
        /// <param name="caption">标题</param>
        /// <param name="timeout">设定指定毫秒后关闭</param>
        public static void Show(string text, string caption, int timeout = )
        {
            new MessageBoxAutoClose(text, caption, timeout);
        }
        /// <summary>
        /// 提示关闭
        /// </summary>
        /// <param name="text">显示提示内容</param>
        /// <param name="caption">标题</param>
        /// <param name="msgButton">提示按钮</param>
        /// <param name="timeout">设定指定毫秒后关闭</param>
        public static void Show(string text, string caption, MessageBoxButtons msgButton, int timeout = )
        {
            new MessageBoxAutoClose(text, caption, msgButton, timeout);
        }
        /// <summary>
        /// 提示关闭
        /// </summary>
        /// <param name="text">显示提示内容</param>
        /// <param name="caption">标题</param>
        /// <param name="msgButton">提示按钮</param>
        /// <param name="msgIcon">提示图标</param>
        /// <param name="timeout">设定指定毫秒后关闭</param>
        public static void Show(string text, string caption, MessageBoxButtons msgButton, MessageBoxIcon msgIcon, int timeout = )
        {
            new MessageBoxAutoClose(text, caption, msgButton, msgIcon, timeout);
        }

        void OnTimerElapsed(object state)
        {
            IntPtr mbWnd = FindWindow(null, _caption);
            if (mbWnd != IntPtr.Zero)
                SendMessage(mbWnd, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
            _timeoutTimer.Dispose();
        }
        const int WM_CLOSE = 0x0010;
        [System.Runtime.InteropServices.DllImport("user32.dll", SetLastError = true)]
        static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
        [System.Runtime.InteropServices.DllImport("user32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto)]
        static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);
    }