延時關閉彈窗，替代MesssageBox

1，新建一個窗體MessageForm,在裡面加一個label控制項和timer

2,代碼如下：

   public partial class MessageForm : Form
    {
         int t;
         string txt;
       
        /// <summary>
        /// 自定義彈窗
        /// </summary>
        /// <param name="time">窗體消失時間</param>
        /// <param name="text">窗體提示內容</param>
        public MessageForm(int time, string text)
        {
            t = time;
            txt = text;
            InitializeComponent();
        }
        private void timer1_Tick(object sender, EventArgs e)
        {
            this.Close();
        }

        private void MessageForm_Load(object sender, EventArgs e)
        {
            label1.Text = txt;
            timer1.Interval = t;
            timer1.Start();
        }
    }

3，在其他窗體調用：

    MessageForm mf = new MessageForm(3000, "輸入參數有誤");
                mf.Show();