Thread: Add cutom event on form

How I can append custom event on form like I do it on button:
button1.Click += System. ... ?

One word: delegates.

for example:

Code:

public delegate void OnChange(string data);

You can pass a method that has a signature as follows to this delegate.

Code:

public void Bla(string d);

So suppose you have a class as follows:

Code:

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;

namespace ConsoleTest {

	public delegate void OnChange(string data);
	
	class EventTest {

		public OnChange Update;

		private Thread t;

		private int[] ar;

		private int fireEvent;

		public EventTest(int members,int fireEventMember) {
			ar = new int[members];

			this.fireEvent = fireEventMember;
			
			t = new Thread(new ThreadStart(this.Run));
			t.IsBackground = true;
			t.Start();
		}

		public void Run() {
			while (true) {
				for (int i = 0; i < ar.Length; i++) {
					if(i==this.fireEvent) {
						this.Update(i.ToString());
					}
				}
				Thread.Sleep(500);
			}
		}
	}
}

Now each time i==this.fireEvent is true Update is called.

Upto now all of this is pretty useless ... unless we do something with Update...

So in our Program class we write.

Code:

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleTest {
	class Program {
		static void Main(string[] args) {

			Program p = new Program();

			EventTest test = new EventTest(10, 5);
			test.Update = new OnChange(p.Display);
			test.Update += new OnChange(p.DisplaySecond);


			Console.ReadLine();
			test.Update -= new OnChange(p.DisplaySecond);

			Console.ReadLine();
		}

		public void Display(string d) {
			Console.WriteLine("From method 1: " +d);
		}

		public void DisplaySecond(string d) {
			Console.WriteLine("From method 2: " + d);
		}
	}
}

So we actually give the meaning of what should happen in Program. Each time Update is called the methode Display should be executed.

Subscribing and un- is done trough += and -= .

If you dont understand any of this, search for some delegate tutorials....

I know about it, BUT i ask about Form`s custom event like OnLoad, which can be alerted by ME but not by OS or other things.
or how i can by my own do it ?

I think i found: Form.Events.AddHandler(), but I still want to found a few examples how to use it.