using System;
using System.Windows.Forms;
using System.Drawing;

public class Butevent:Form  {
TextBox t1 = new TextBox();
Button b1 = new Button();
public Butevent() {
this.Text = "C# Program ";
t1.Location = new Point(20,30);
b1.Text = "Click here to activate";
b1.Location = new Point(20,55);
b1.Size = new Size(150,20);

     // Invoking Method or EventHandler
     b1.Click+=new EventHandler(OnClick);

     this.Controls.Add(t1);
     this.Controls.Add(b1);

     // Invoking Method or EventHandler
     this.Resize += new EventHandler(OnResize);
   }

   //Applying EventHandler
   public void OnResize(object sender,EventArgs ee) {
      MessageBox.Show("oops! Form Resized");
   }

   //Applying EventHandler
   public void OnClick(object sender,EventArgs e) {
      t1.Text = "Hello C#";
   }

   public static void Main() {
      Application.Run(new Butevent());
   }

}