>Thought I would let you know, I'm on track to find the error.
>
>I started a new myBase.vcx in myClasslibs.exe and a form in myMain.exe that uses it, and I got it to work.
>So I don't think it was because myClassLibs.exe couldn't be found. It has to be something hardcoded in the classlibs somewhere.

Glad you might have gotten on the track to solve your problem. My sample worked, so it is possible. I have done apps (not .EXEs) that have dealt with external classlibs, but not quite the way you're doing it.