How to set an event handler for a lower class radiobutton ?

[zmarcoz]

I create a user control group sub-class. There are two radiobuttons. I need to create event handlers for them.I create event handlers in the sub class and let the event handler to change a constant in the subclass. I will use a function to check the sub class constant in the upper class. Note I have commented out two lines (they are the event handler creation) because they are wrong because they create errors please help.

I uploaded the sub-class code. PLease help