The easiest way to achieve the desired result would be to create a custom control, which can inherit from the default RegistrationForm
control. Then you hook to one of the available events and implement your custom logic.
All the best,
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items