Perhaps you should have a look at http://apache.ece.arizona.edu/~edatools/Python/PythonOOP.doc -- Magnus Lycka, Thinkware AB Alvans vag 99, SE-907 50 UMEA, SWEDEN phone: int+46 70 582 80 65, fax: int+46 70 612 80 65 http://www.thinkware.se/ mailto:magnus at thinkware.se