Hi, im almoast finished with my assignement now and I want to thank all who has answered for valuable feedback. It has guided me in the right direction and I appreciate it alot. But I have a last question.
Service Tracker vs DS? Are there some situations that the other is better. I have read this: http://njbartlett.name/2010/08/05/when-servicetrackers-trump-ds.html. And seen that there are some cases. I have also read somwhere, but cant find it again, that if one want to have a dynamic GUI, such as a main controller getting services, where the service provide gui for the main controller. Service tracker should also be used. I dont know how DS can controll this dynamism that multiple implementations of a service can come and go and instantiate a GUI coming from the service. Or is this what multiple=true might be used for? I have not had the time to try this out. -- Mvh Snorre Lothar von Gohren Edwin +47 411 611 94

