>I am new to OOP myself, and it took be a while to 'get it'. The way I see it, so far, is that subclassing offers two main advantages. First, you don't bugger up your base classes, so if you really screw things up, you can revert to those. Second, and more important, the subclasses can contain all the procedures and functions you used to put into a procedure file or separate standalone program files. What I couldn't see for many moons was the point or advantage of that.

I just started using the add property and add method features a few weeks back, and am just beginning to understand a little OOP. Your comments are helpful.
Thanks
Terry