Abstract
Component-based development (CBD) is an emerging area in computer science. One general problem of CBD is the visualisation of components, their behaviours and their inter-dependencies. In order to support an integrated way of designing, implementing and maintaining components, the authors are working on a system called VOODE/VOOPL-1 (Visual Object-Oriented Development Environment/Visual Object-Oriented Processor Language version 1) which tries to combine visual modelling with visual programming for CORBA component development. The emphasis lies primarily in the visualisation of structures and design issues rather than on implementation details.