Hi I think if you look at the code for the hyperlinkcommand button
it uses internet explorer to go to the Web site via automation of the IE Object model
You could change this code and use the API shellexecute and pass it the web site address
shellexecute(0,"open","
www.mysite.com","","",1)
this would open the default browser on the machine no matter what browser was set as default.
Hope this helps
Steven Bowskill