>How do I subclass an existing class (not a VB base class, but I class that I downloaded from UT) in VB6.0? I need general direction to get me started. TIA.

Since you really meant VFP, is this a VCX? You can open the class in the class browser, then click the new class button and base it on whatever class in the library you want. Otherwise, see the DEFINE CLASS help topic if you want to learn how to do this with code.