I would recommend highly recommend http://www.amazon.com/exec/obidos/ASIN/0596003471/qid=1060750382/sr=2-1/ref=sr_2_1/103-0978763-6160669 Programming .NET Components by Juval Lowy (ORielly publications). Its a must read. __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com