I have been through your sampels http://demos.telerik.com/aspnet-ajax/window/examples/browserdialogboxes/defaultcs.aspx and I have no issues getting these to work. But I have been unsuccesful in getting the values of the confirm in my serverside code behind. Basically im trying to fire one server side function if yes/true and a different server side sub if no/false. In your samples you are firing a javascript to display the result, thats fine but unfunctional for my application.