With VS 2008 and maybe in VS 2005 using the Microsofts reporting tools (Reportviewer, RDLC) you have the option to toggle the visibility of a control based on action taken on another control. For example I can have a lable that represents "collapse" or "Expand" when user clicks on that label you can wire it up to toggle the visibility of another control such as a subreport. Telerik support this functionality?