Hello, vtkCommand class doesnt exist in Java? I am trying to call abc->AddObserver(*vtkCommand::InteractionEvent*, myCallBack) but i cant find vtkCommand class. Gökhan -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20080822/05172cf3/attachment.htm>