Thanks Wilfried, I'll check that out first thing tomorrow.
I tried further to get my data into a MapPoint.Dataset. I implemented the Dataset interface but i am not sure how to write the needed methods. I am getting the feeling that I missed something very big to do this. Furthermore, I had problems using the displaydatamap method because i didn't have all the parameters and didn't know what the are standing for.

I hope someone can help. Thanks everyone so far.
Regards
Sebastian