.net c# winform锁定电脑计算机

.net c# 判断系统长时间未使用,则锁定计算机.只需要一段简单的代码即可.

        [DllImport("user32.dll")]
        private static extern void LockWorkStation();
        private void zbtnlock_Click(object sender, EventArgs e)
        {
            LockWorkStation();
        }