Looked up "polymorphism" in VFP7 SP1 Help "Search" option.

The first reference stated:
"Use Access/Assign Methods for Polymorphism Sample

File: ...\Samples\Solution\Tahoe\Aa_outline.scx

This sample uses Access/Assign methods to demonstrate object polymorphism."

The referenced file is not in the directory indicated.

A "Find" didn't locate it in VFP7 either (did find a VFP6 rendition in another directory).