I'm working on a WPF application. On this application, I use custom MarkupExtension that I add to my WPF with a custom DialogPropertyValueEditor. My problem is that once I've added my MarkupExtension, I can't change it, the field is locked.
I have to reset the property and then create a new one. This reset is done by clicking on the small square on the right side.
(sorry, it's french version of VS)
I would like to know if it is possible to add or modify functionalities to the context menu of this small square.