The functionalities of SICStus Objects, a system allowing object oriented programming in SICStus Prolog are shown and an example is presented: support software for building graphical user interfaces. This text assumes a basic knowledge about Prolog programming in SICStus Prolog and some intuition about object oriented programming. SICStus Objects was implemented as an embedded language in SICStus Prolog by Seif Haridi and Kent Boortz. SICStus Prolog is developed and maintained by Mats Carlsson, Stefan Andersson and Kent Boortz at SICS with support from Ellemtel Utvecklings AB.