Did you try, in your startup code:

Set Procedure to ClassName Additive

>I have a class in code (ClassName.prg) in which I subclass from a Visual Class library. My application works fine in development mode but on building an EXE I get the subject message. VFP can't locate the visual class: (ClassName) when the (ClassName) is contained in a PRG. I get compile errors on the two VCXs which the PRG subclasses as well.
>
>Can anyone shed some light on what might be happening?
>
>Thanks,
>
>-Malcolm Donald