>Does anyone know how to find out the path to the VCX holding the class that is currently in design mode?
>
>I want to use this in a builder, so that I can programmatically add other classes to the same library.
>
>I have tried the ClassLibrary property, but this returns the location of the VCX holding the Parent-Class of the class being designed.
>
>Any ideas anyone...?

ASELOBJ(laObj,1)
lcCurrentClass = SYS(1271, laObj[1])

The help says SYS(1271) only works on SCX files, but it works on VCX's as well.
(At least in 6.0 SP3)