I just got the new Software Development and I had to LOL while reading the departments listings. Bob O'Brien has a short article on "Simulating Inheritance."
"You can easily compensate for VB's lack of inhereitance, but you might find that you're better off without it"
In essence he says thay you could create a procedure file to hold all of your older version code in case you needed it.
His closing lines are, "I've participated in several projects (using other languages) where relying too much on inheritance became a major problem. Visual Basic's Lack of inheritance helps limit such errors."
That's what I love about Microsofts Flagship Product. They keep all the really hard stuff away from the people who could do the most dammage.