Mark,

I'm not completely sure this will help or cover your situation, but let me throw out some general stuff, and if it doesn't answer your question, maybe someone else can jump in.

Let's say you have a function in a base class, one that you may wish to 'override' when you subclass it. We'll call it 'myfunction'.

You need to declare it with the virtual keyword, and then when you subclass it, you use the 'override' method. For instance..

-base class
public virtual string MyFunction()
{
return "base";
}

-subclass (which inherits from your base class)
public override string MyFunction()
{
return "override";
}

Now, that is a complete override. There are times in the subclassed instance where you may want to run the 'base' behavior (sort of like a DODEFAULT() in VFP). In that instance, you can use the 'base' keyword to call the base method (e.g. base.MyFunction()

At the risk of advertising, there's an excellent book ".NET for VFP Developers" that has a good section on Object Oriented development in VB and C#. It's available on Amazon and www.hentzenwerke.com, and it worth the price ten-fold.

Hope this helps,
Kevin