The Rave talk I gave at the ADUG Symposium in 2003 is available at: http://www.esbconsult.com/raveaddons/index.html It does contain some info on doing Calculations that might be useful :) Glenn Crouch mailto:glenn at esbconsult.com ESB Consultancy http://www.esbconsult.com Home of ESBPCS & ESB Calculators Kalgoorlie-Boulder, Western Australia