WinFrom系统长时间不操作则进行关闭+关闭窗口倒计时

标题：WinFrom系统长时间不操作则进行关闭+关闭窗口倒计时

1.首先在界面添加两个timer
2.在窗体运行是开启第一个timer
3.（ 0x0202://鼠标左键UP，0x0205://鼠标右键UP，0x0203://鼠标左键双击,case 0x201://鼠标左键Down,case 0x100://键盘按下）
public Form7()
{
InitializeComponent();
MyMessager msg = new MyMessager();
Application.AddMessageFilter(msg);
timer1.Start();
}

    static int iOperCount = 0;
    static IntPtr hwnd;
    static int t;
    internal class MyMessager : IMessageFilter
    {
        public bool PreFilterMessage(ref Message m)
        {
            //如果检测到有鼠标或则键盘的消息，则使计数为0.....
            if (m.Msg == 0x0202 || m.Msg == 0x0205 || m.Msg == 0x0203 || m.Msg == 0x201||
                m.Msg == 0x100)
            {
                iOperCount = 0;
            }
            return false;
        }
    }
    private void timer1_Tick(object sender, Ev