Win4Eu base-library

This weekend, I'm writing a large part of the base-library (w4ebase.ew) of Win4Eu.
Today I've written the class- and object-system that is the essential core of Win4Eu.
Euphoria is not an object-oriented language, and doesn't have to be object-oriented: the power of Euphoria lies in its simplicity and its advanced sequence-system.
But, the Win4Eu-architecture requires a minimal object-oriented system. So I created such a system, specifically designed to include all the functionality required by Win4Eu (classes & instances, simple inheritance, verbs (=system-defined methods), properties, events, ...).
After writing the code, I changed the design document win4eu.pdf a bit, to match the written code.