I doubt you can do it in VB6. You need to create Activex controls and then subclass those activex controls. In VB.NET its Possible but I dont know how to do it. I put the question here 2 weeks ago but no reply. OOP is new to the VB world and it will take som time before everyone get a grip of it. I even placed questions to so called VB gurus but no one has the answer.
and another thing in VFP you can change say The Font of your Base Class and then all over the apps you can see the change straight away. But in VB you have to recompile the Class and only then you can see the change. Hope Beta 2 of VB .NEt has some proper samples

Regards,
Fred