Is there a way to verify that a class definition, ie "object.classname" exists before using createobject to create the object?

We are writing hardware interfaces for a POS program, and when a user chooses a hardware device and tries the device, sometimes it crashes because they haven't installed the hardware device drivers properly.

Anyway, it's annoying to me and the user when class definitions don't exist, or haven't been installed and they get an application shutdown message.

Thanks!