> I am fairly new to VFP and I have not been able to find the detail info
>for VFP's BASE CLASSES (the CONTROL CLASS for example).
>I have looked in the docs and other books. Please advise.

For most information, the official written documentation for VFP is not usable. Most of what you'll need is in the main Help file.

Don't forget that it is better programming practice to subclass your own base classes, rather than use the VFP base classes directly.