You can easily interact with the Telerik ASP.NET Window object by using the Behaviors property. Behaviors controls whether the user can move or resize the window, whether it has maximize and minimize buttons, whether it can be pinned, and whether there is a close button on the title bar.
To specify a combination of behaviors (other than the default), you can combine Behaviors values. For example, if you want to let the user close the window using a button on the title bar, and to move the window by dragging it, but do not want any other buttons on the title bar, set Behaviors="Close, Move".
See demo
Top