>>>I have installed these controls http://www.componentfactory.com/free-windows-forms-controls.php
>>>
>>>They appear in the toolbox. How do I subclass the KryptonHeaderGroupControl? I would like to create a base level control based on it, then subclass it some more, but I don't know how to make a subclass.
>>
>>
>>

>>   using KryptonHeaderGroup...
>>
>>   public class MyKryptonControl : KryptonHeaderGroupControl
>>   {
>>      public MyKryptonControl ()
>>      {
>>      }
>>   }
>>

>
>
>Actually, I created a UserControl, dropped the group on it, and there it is.

You're not really creating a subclass then.