I need a button that is visually completely customizable, but has custom logic to publish events and manage it's visual state based on events it has registered for.

When I say visually customizable, I mean I should be able to both create the button in xaml and set it's style by binding to the supplied style. Or I can create an instance of the button and set the style by passing a parameter to an alternate constructor. Or by calling a method on the button class to set the style.

I do not plan on substituting the controls template, it should be a button. Can anyone point me to some code samples of this?