C#获取键盘和鼠标操作的时间的类

///

/// 创建结构体用于返回捕获时间
///

[StructLayout(LayoutKind.Sequential)]
struct LASTINPUTINFO
{
///

/// 设置结构体块容量
///

[MarshalAs(UnmanagedType.U4)]
public int cbSize;

///

/// 抓获的时间
///

[MarshalAs(UnmanagedType.U4)]
public uint dwTime;
}

[DllImport("user32.dll")]
private static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);
///

/// 获取键盘和鼠标没有操作的时间
///

/// 用户上次使用系统到现在的时间间隔，单位为秒
public static long GetLastInputTime()
{
LASTINPUTINFO vLastInputInfo = new LASTINPUTINFO();
vLastInputInfo.cbSize = Marshal.SizeOf(vLastInputInfo);
if (!GetLastInputInfo(ref vLastInputInfo))
{
return 0;
}
else
{
long count = Environment.TickCount - (long)vLastInputInfo.dwTime;
//long icount = count / 1000;
return count;
}
}

private void timer1_Tick(object sender, EventArgs e)
{
int sunNumber=int.Parse(GetLastInputTime().ToString());
if (sunNumber >= 30000)
{
this.Close();
}

}