Extenders: Sub-categories for properties in design-mode?

I noticed that when creating properties for an extender control that they appear by default on the target control properties display in the designer all under the same category (the extender control name). The <category> attribute of the extender properties seems simply to be ignored. My control has a lot of properties (client-side charts) and it would be nice to be able to categorize them.

Is there a way to actually create sub-categories under the ExtenderName category for properties on the targeted control?

Thanks in advance,
Pascal

Unfortutately not, the property grid doesn't support categories on sub-objects. There really isn't a clean solution for this as an extender, but based on your description, I'm not sure an extender is what you really want to be using.

My guess is that you want to write a control that emits an extender as part of it's rendering process. That way, you can expose the properties via your control as you would a normal component, and then just pass those values down to the extender via code.