AJAX :: Creating A Custom Styles Select Button For HTMLEditor?

I have been trying to create a custom Styles select button for the HTMLEditor control based on the examples given in the CustomButtonsAndPopups.cs and CustomEditor.cs files. I have had some success: The select button is displayed and the functionality of selecting a style (eg. H1, H2, P etc) and changing the style of selected text works but there are two problems that make it different from the Font Name select button: There is no label next to the button and there is no default text:

The style button is on the left. The Font Name select button is on the right

how to add the label and the default option?

Here is my version of the CustomButtonsAndPopups.cs file:

using System;