Hi Matt,

>So basically as long as I keep the code compatible with 5.0, and keep the library compiled in 5.0 I can use it in 5.0 and 6.0?

Yes.

>I was affraid that even opening the library in 6.0 Class Browser would update it to 6.0 format and make it not usable with 5.0.

Not in the Class Browser, but opening in the Class Designer does change it to VFP 6.

Christof