How do I determine idle time in my C# application?

Question

I want to get the Windows Idle Time from my application. I am using exactly this code:

http://dataerror.blogspot.de/2005/02/detect-windows-idle-time.html

I h

Answer 1

    protected override void OnLoad(EventArgs e)
    {
    /* Check if we are in idle mode - No mouse movement for 2 minutes */
    System.Windows.Forms.Timer CheckIdleTimer = new                    System.Windows.Forms.Timer();
    CheckIdleTimer.Interval = 120000;
    CheckIdleTimer.Tick += new EventHandler(CheckIdleTimer_Tick);
    CheckIdleTimer.Start();
    }
    private void CheckIdleTimer_Tick(object sender, EventArgs e)
    {
    uint x = IdleTimeFinder.GetIdleTime();
    if (x > 120000) {
         //...do something
    }
    }


    public class IdleTimeFinder
    {
    [DllImport("User32.dll")]
    private static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);

    [DllImport("Kernel32.dll")]
    private static extern uint GetLastError();

    public static uint GetIdleTime()
    {
    LASTINPUTINFO lastInPut = new LASTINPUTINFO();
    lastInPut.cbSize     (uint)System.Runtime.InteropServices.Marshal.SizeOf(lastInPut);
    GetLastInputInfo(ref lastInPut);
    return ((uint)Environment.TickCount - lastInPut.dwTime);
    }

   public static long GetLastInputTime()
   {
    LASTINPUTINFO lastInPut = new LASTINPUTINFO();
    lastInPut.cbSize                (uint)System.Runtime.InteropServices.Marshal.SizeOf(lastInPut);
    if (!GetLastInputInfo(ref lastInPut))
    {
    throw new Exception(GetLastError().ToString());
    }
    return lastInPut.dwTime;
    }
    }


 internal struct LASTINPUTINFO
{
    public uint cbSize;

    public uint dwTime;
}