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

class ex : Form
{
    Label lb1 = new Label();
    TextBox tb1 = new TextBox();
    Button b1 = new Button();

    ex()
    {
        Text = "hello";
        lb1.Text = "example_label:";
        b1.Text = "button";
        b1.Click += new EventHandler(button_b1_click);
        tb1.Location = new Point(100, 0);
        b1.Location = new Point(200, 0);
        Controls.Add(lb1);
        Controls.Add(tb1);
        Controls.Add(b1);
    }

    void button_b1_click(object sender, EventArgs e)
    {
        tb1.Text = "example";
    }

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