>I am creating 2 programmatic classes. I want to base class 2 off of
>class 1. How do I do this:
>

>DEFINE CLASS MyClass2 AS MyClass1 IN SomeProgram

>There is an OF ClassLibrary clause, but I don't see a way to
>base the new class from an existing class in another PRG.

You can use OF ClassLibrary clause.

DEFINE CLASS MyClass2 AS MyClass1 OF SomeProgram.fxp