How To Build Multi-control Components when Inheriting from an Existing Control (Intro and TextBox Example)

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace MultiCtrls
{
	public partial class LabeledTextBox : TextBox
	{
		public LabeledTextBox()
		{
			InitializeComponent();
		}
		protected Label _label = null; // our label
		protected string _LabelText = ""; // caption of our label
		protected int _offset = 5; // space between editbox and label
		public int offset
		{
			get { return _offset; }
			set
			{
				_offset = value;
				setControlsPosition();
			}
		}
		public string LabelText
		{
			get { return _LabelText; }
			set
			{
				_LabelText = value;
				setControlsPosition();
			}
		}
		protected virtual void setControlsPosition()
		{
			if (_label != null)
			{
				_label.Text = _LabelText;
				_label.AutoSize = true;
				_label.Left = this.Left - _label.Width - _offset;
				_label.Top = this.Top + 3;
			}
		}
		protected override void OnParentChanged(EventArgs e)
		{
			if (this.Parent != null)
			{
				_label = new Label();

				this.Parent.Controls.Add(_label);
				setControlsPosition();
			}
			base.OnParentChanged(e);
		}
		protected override void OnLocationChanged(EventArgs e)
		{
			setControlsPosition();
			base.OnLocationChanged(e);
		}
		protected override void Dispose(bool disposing)
		{
			if (_label != null)
				_label.Dispose();
			if (disposing && (components != null))
			{
				components.Dispose();
			}
			base.Dispose(disposing);
		}
	}
}