ELMAH AFTER CONFIGURATION NOW....How to use class and event...Any sample examples?

Hi all.
 I have downloaded and setuo ELMAH From
http://code.google.com/p/elmah/
 Also setup web.config and register namespace in my code.
I can see list of class, event when i type ELMAH.  ( and thry intellisense it list all prop-class-even)
I also went to following site and download code and try to see NOW HOW USE THIS ALL CUSTOM CLASS OF ELMAH in my project
http://www.asp.net/LEARN/hosting/tutorial-14-vb.aspx
But cou;dn't find any code...all whas WEB.CONFIG setup..
 
I am novice .NET Developer....Not get idea about how to start writing class...what property-method to use...
I can study exisitng  code-samples and make my custom class.
 
I wanna use ELMAH to show custom error page with detail exception information..
With just basi ...