Add extra fields to CreateUserWizard

Hi,

I am using Membership provider to create a registration form. I am using CreateUserWizard and I need to include 2 more fields (ddl, textbox), and I am using profile to store the information. I know how to configure profile in the web.config file. But I don't know how to add the two more fields into the CreateUserWizard form (UI) and also when clicking the button 'create user' how to let it know to store the two extra fields into the aspnet_Profile table.

Please provide me some code, steps how to make it work. 

Thank you.
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