Hi I wonder if there is any difference between 1. vtkProp* const vtkAssemblyNode::GetProp() and 2. const vtkProp* vtkAssemblyNode::GetProp() Version 1 is part of VTK-5 but I havn´t seen such C++ code, yet. For wrapping vtk I need to know if I can change it to Version 2 ? Any C++ guru out there? Greetings Jens