[vtkusers] object factories

[Wolfram H Volpi]

Are there any examples of an implemented object factory that overrides a
vtk class? 

I read the February 2000 vtk User's Guide, section 9.5 Object Factories.
There seems to be a contradiction between the documentation and the
example factories.

"How To Write A Factory", page 206, says you must implement CreatObject(). 
"How To Install A Factory", page 207, says a dynamically loaded factory
must have vtkLoad(). 

The last sentence refers to examples vtkGraphicsFactory and
vtkImageFactory.  But neither example implements the two functions
specified above. 

Does anyone have an example of a dynamically loaded vtk object factory
with a DLL that over rides a class?

Thank you,
Wolfv