public partial class BaseForm : Form    {        private Timer timer;        int x, y;        DateTime start;        bool ff = true;         public BaseForm()        {            timer = new Timer();            x = Control.MousePosition.X;            y = Control.MousePosition.Y;            timer.Interval = 1000;            timer.Tick += new EventHandler(timer_Tick);            timer.Start();        }        protected void timer_Tick(object sender, EventArgs e)        {            int x1 = Control.MousePosition.X;            int y1 = Control.MousePosition.Y;            if ((x == x1) && (y == y1) && ff)            {                start = DateTime.Now;                ff = false;            }            if (x != x1 || y != y1)            {                x = x1;                y = y1;                start = DateTime.Now;                ff = true;            }            TimeSpan ts = DateTime.Now.Subtract(start);            if (ts.Seconds > 5) Environment.Exit(0);  //把5改成30，就是30秒        }        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)        {            start = DateTime.Now;            return base.ProcessCmdKey(ref msg, keyData);        }    }