<snip>
>Furthermore: I do a SET CLASSLIB TO datacom in the class datacom ITSELF, to be able to get to CZipLib which is contained in the datacom.vcx as well.
>It works now, but I don't get why I should do this. Aren't all classes within a VCX loaded as soon as you reference the VCX?

SET CLASSLIB command opens a class library but it doesn't load classes into memory.