首先创建两个窗口，form1,spacerest
form1下代码如下：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace spacerest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
InitTimer();
}
/// <summary>
/// 定义一个计数器
/// </summary>
public static System.Windows.Forms.Timer timer1 = new System.Windows.Forms.Timer();
//private int Interval = int.Parse(System.Configuration.ConfigurationManager.AppSettings["time"]);
/// <summary>
///定义一个等待的时间10秒
/// </summary>
private int Interval = 10000;
/// <summary>
/// 初始化时间
/// </summary>
private void InitTimer()
{
Form1.timer1.Interval = 100;
Form1.timer1.Enabled = true;
Form1.timer1.Tick += new System.EventHandler(this.timer1_Tick);
}
/// <summary>
/// 时间计数
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void timer1_Tick(object sender, EventArgs e)
{
LASTINPUTINFO plii = new LASTINPUTINFO();
unsafe
{
plii.cbSize = (uint)sizeof(LASTINPUTINFO);
}
if (GetLastInputInfo(ref plii))
{
//超过10分钟自动锁定程序
if (GetTickCount() - plii.dwTime >= Interval)
{
Form1.timer1.Enabled = false;
spacerest space = new spacerest();
space.ShowDialog();
}
}
else
throw new Exception("GetLastInputInfo 函数调用失败");
}
[StructLayout(LayoutKind.Sequential)]
public struct LASTINPUTINFO
{
public uint cbSize;
public uint dwTime;
}
[DllImport("Kernel32.dll")]
public static extern uint GetTickCount();
[DllImport("user32.dll")]
public static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);
public static void CloseForm()
{
if (ms_MainFrame != null && ms_MainFrame.IsDisposed == false)
{
ms_MainFrame = null;
}
}
private static Form1 ms_MainFrame = null;
public static Form1 GetMainFrame
{
get
{
return ms_MainFrame;
}
}
private void systimer_Tick(object sender, EventArgs e)
{
this.label1.Text = DateTime.Now.ToString("yyyy-MM-dd HH-mm-ss");
}
}
}