GUI Windows Form C#

/*
User Interfaces in C#: Windows Forms and Custom Controls
by Matthew MacDonald
Publisher: Apress
ISBN: 1590590457
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace ControlMedley
{
    /// 
    /// Summary description for ControlMedley.
    /// 

    public class ControlMedley : System.Windows.Forms.Form
    {
        internal System.Windows.Forms.Label Label1;
        internal System.Windows.Forms.TextBox TextBox1;
        internal System.Windows.Forms.Button Button1;
        /// 
        /// Required designer variable.
        /// 

        private System.ComponentModel.Container components = null;
        public ControlMedley()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();
            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }
        /// 
        /// Clean up any resources being used.
        /// 

        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }
        #region Windows Form Designer generated code
        /// 
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// 

        private void InitializeComponent()
        {
            this.Label1 = new System.Windows.Forms.Label();
            this.TextBox1 = new System.Windows.Forms.TextBox();
            this.Button1 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // Label1
            // 
            this.Label1.FlatStyle = System.Windows.Forms.FlatStyle.System;
            this.Label1.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
            this.Label1.Location = new System.Drawing.Point(20, 92);
            this.Label1.Name = "Label1";
            this.Label1.Size = new System.Drawing.Size(112, 24);
            this.Label1.TabIndex = 5;
            this.Label1.Text = "Label1";
            this.Label1.Click += new System.EventHandler(this.ctrlClick);
            // 
            // TextBox1
            // 
            this.TextBox1.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
            this.TextBox1.Location = new System.Drawing.Point(20, 56);
            this.TextBox1.Name = "TextBox1";
            this.TextBox1.Size = new System.Drawing.Size(156, 21);
            this.TextBox1.TabIndex = 4;
            this.TextBox1.Text = "TextBox1";
            this.TextBox1.Click += new System.EventHandler(this.ctrlClick);
            // 
            // Button1
            // 
            this.Button1.FlatStyle = System.Windows.Forms.FlatStyle.System;
            this.Button1.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
            this.Button1.Location = new System.Drawing.Point(20, 16);
            this.Button1.Name = "Button1";
            this.Button1.Size = new System.Drawing.Size(96, 28);
            this.Button1.TabIndex = 3;
            this.Button1.Text = "Button1";
            this.Button1.Click += new System.EventHandler(this.ctrlClick);
            // 
            // ControlMedley
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 14);
            this.ClientSize = new System.Drawing.Size(316, 214);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.Label1,
                                                                          this.TextBox1,
                                                                          this.Button1});
            this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
            this.Name = "ControlMedley";
            this.Text = "Control Medley";
            this.ResumeLayout(false);
        }
        #endregion
        /// 
        /// The main entry point for the application.
        /// 

        [STAThread]
        static void Main() 
        {
            Application.Run(new ControlMedley());
        }
        private void ctrlClick(System.Object sender, EventArgs e)
        {
            Control ctrl = (Control)sender;
            MessageBox.Show("You clicked: " + ctrl.Name);
        }
    }
}