Brad, I'm converting itkIndex, Size and Offset to be subclasses of itkArray. I'd like to be able to do: itk::Index<3> myIndex = 1,2,3; itk::Array<long,3> myArray = 1,2,3; I can now do: itk::Index<3> myIndex; myIndex = 1,2,3; itk::Array<long,3> myArray; myArray = 1,2,3; Any ideas? Bill