Hi Mosu Babu,
In Sitefinity 4.x you have the ability to create a custom page from which you pages to inherit. You have to create a class which inherits from ASP.NET Page class. There in the Init event of the page you have to traverse the control tree and find the controls for which you want to attach event handlers. Once you find those controls you have to create event handlers for them. The custom page type is set from each page's properties.
All the best,
the Telerik team
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