I use the DrawFilter to change the border, but I am not quite sure which phase to alter it in and I don't really understand what method to call to actually override.

The goal is to use a custom shape border for the button.  What I'd like to do is have a more oval button shape that can't be reproduced using something like BorderType.Round4 or something.

I didn't see a decent example in the KB that addresses this.  Can someone give me a simple example of this?  Thanks.