Hi All !
I know nothing of design time component but I need to write one with a
tricky problem.

I have an app to edit / view a data structure, let say 'house' object with
many 'room' and 'furniture' objects

I want to write a plugin (as a DLL) which would work only for a give
datastructure (a given 'house' object)
and I want to be able to use this room object in the designer (use the
'room' data in it)

I was thinking to use visual inheritance, having my plugin inherit from some
given specific form object (which I desing in an other project) with a
'House' property (instanciated from amy data file)

Any sample of such feat ? or links or tip or something ?