CSharp NumericTextBox control

I've post here a simple custom control that it accepts only numeric input.
The only one methods in the OnKeyPress (overrided) and accept only digit or the backspace

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;

using DrLuiji.Controls
{
public class NumericTextBox : TextBox
{     
  protected override void OnKeyPress(KeyPressEventArgs e)
  {
      base.OnKeyPress(e); 
      if (!((Char.IsDigit(e.KeyChar))||(e.KeyChar.Equals('\b'))))
      {         
          e.Handled = true;     
          ErrorBeep();
      }
 }
    public void ErrorBeep()
 {
           //Console.Beep();
 }
}
}

To use it you just drag & drop the control from the toolbox to your form.

Have fun.