How many times Application.Idle event is generated per second when application is idle?

Question

Hi,
I want to implement a function when application is idle for more than 20sec.. Am using Application.Idle for determining application's idle state.. But i don know how to calculate the idle duration.. Can any one provide a sample code?

Answer 1

E.g.
namespace WindowsFormsApplication2
using System;
using System.Windows.Forms;
public partial class Form1 : Form
MessageFilter messageFilter ;
public Form1()
InitializeComponent();
Application.Idle += new EventHandler(this.Application_Idle);
this.messageFilter = new MessageFilter(this);
Application.AddMessageFilter(this.messageFilter);
private void Application_Idle(Object sender, EventArgs e)
this.timer1.Enabled = true;
private void timer1_Tick(object sender, EventArgs e)
this.textBox1.Text += "timer1_Tick";
public void StopTimer()
this.timer1.Enabled = false;
public class MessageFilter : IMessageFilter
private Form1 owner;
public MessageFilter(Form1 form)
this.owner = form;
public bool PreFilterMessage(ref Message m)
const int WM_TIMER = 0x113;
if ( m.Msg != WM_TIMER)
this.owner.StopTimer();
return false;