As I experienced a sudden nostalgic longing for the VB6 of old, I downloaded visual studio 6 from my msdn subscription. To revive my rusty knowledge I very much would like to have intellisense working, but it does not! Is this a known problem with VS6 on Windows 7? I do have the autocomplete option on in the Options menu.
VS6 does work properly for me on Win7.
The only problem is that it fails to add a reference to a COM object/library because UAC prevents it from reading required registry keys. Maybe your problem has the same nature. Try to run the IDE elevated.