Intellisense does improve programmer productivity as you do not have to keep opening header files to refer to the interfaces. In VC++ the intellisense display also shows the function header comment, so you have full access to the information about the interface.
Deepa -- EventStudio 2.5 - http://www.EventHelix.com/EventStudio Model in Plain Text; Generate Sequence Diagrams in PDF/Word -- http://mail.python.org/mailman/listinfo/python-list