Hello, everyone

I am trying to create a builder for a custom control, callable from right-click in designer. I registered the builder in builders.dbf, and it works well. The problem is if I subclass the control and drop it on a form (or open it in class designer), right-click/Builder shows "there are no registered builders for this control". Well.... CursorAdapter class works this way, no matter how many subclasses are in the hierarchy.

What I am missing here?

Thank you.