To be more specific: I am trying to convert http://www.cmake.org/Wiki/VTK/Examples/Cxx/Picking/HighlightSelectedPoints Dieter -- View this message in context: http://vtk.1045678.n5.nabble.com/vtkCallbackCommand-in-ActiveViz-tp5714143p5714198.html Sent from the VTK - Users mailing list archive at Nabble.com.