自動鎖屏代碼

Q:當我登錄進入主界面時，在規定的時間內沒有做任何操作，系統就註銷（就像電腦的屏保）。

A:其實很簡單,參考一個api函數就可以了：GetLastInputInfo,以下是參考代碼

演示程序在你10秒內沒有任何鼠標鍵盤活動既最小化，最小化後晃動鼠標即可復原

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 WindowsApplication28
... {
public partial class Form1:Form
... {
[StructLayout(LayoutKind.Sequential)]
public struct LASTINPUTINFO
... {
[MarshalAs(UnmanagedType.U4)]
public int cbSize;
[MarshalAs(UnmanagedType.U4)]
public uint dwTime;
}
[DllImport( " user32.dll " )]
public static extern bool GetLastInputInfo( ref LASTINPUTINFOplii);


public long getIdleTick()
... {
LASTINPUTINFOvLastInputInfo = new LASTINPUTINFO();
vLastInputInfo.cbSize = Marshal.SizeOf(vLastInputInfo);
if ( ! GetLastInputInfo( ref vLastInputInfo)) return 0 ;
return Environment.TickCount - ( long )vLastInputInfo.dwTime;
}

public Form1()
... {
InitializeComponent();
}

private void Form1_Load( object sender,EventArgse)
... {
this .timer1.Interval = 2000 ;
this .timer1.Enabled = true ;

}
private void timer1_Tick( object sender,EventArgse)
... {
long i = getIdleTick();
this .Text = string .Format( " jinjazz說:您已經{0}ms沒有動了 " ,i);
if (i > 10 * 1000 )
... {
this .WindowState = FormWindowState.Minimized;
}
else
... {
this .WindowState = FormWindowState.Normal;
}
}

}
}