title: add behavior to group of windows form controls
body: <p>I'm trying to mimic the web functionality of having a label over a textbox that shows the type of value the textbox should contain.  I can add the events individually but I'm wondering if there is a way to add 'Behavior' to a set of controls.</p>
  
  <p>Please see example code:</p>
  
  <pre><code>private void labelFirstName_Click(object sender, EventArgs e)
  {
      HideLabelFocusTextBox(labelFirstName, textBoxFirstName);
  }
  
  private void HideLabelFocusTextBox(Label LabelToHide, TextBox TextBoxToShow)
  {
      LabelToHide.Visible = false;
      TextBoxToShow.Focus();
  }
  
  private void textBoxFirstName_Leave(object sender, EventArgs e)
  {
      if (String.IsNullOrEmpty(textBoxFirstName.Text))
          labelFirstName.Visible = true;
  }
  
  private void textBoxFirstName_Enter(object sender, EventArgs e)
  {
      labelFirstName.Visible = false;
  }
  </code></pre>