>Thank you for your reply and this site is very useful. But I would like to clarify how to access Client's outlook from the page. Is it accessed by ActiveX control? That means, I must create an ActiveX control and call from the web page. The control contains all Outlook access code and manage the function inside. Thanks!!

I'm not sure you need an ActiveX for it, but I haven't explored this task at all, I just pointed you to a good resource.