Use the Behaviors property to determine how the user can interact with the RadWindow object. 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.
Here are the Behaviors' property values:
None - The user can perform none of the actions on the window.
Resize - The user can resize the window by dragging its border.
Minimize - The window can be minimized, and has a minimize button on the title bar.
Close - The user can close the window using a title bar button.
Pin - The window can be pinned, and has a pin button on the title bar.
Maximize - The window can be maximized, and has a maximize button on the title bar.
Move - The user can click on the window title bar and drag it to a new location.
Reload - The user can reload the window contents using a title bar button.
Default - Default object behavior: all of the above.
To specify a combination of behaviors (other than the default), 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":
You can also set the Behaviors property from the code behind:
RadWindow1.Behaviors = Telerik.Web.UI.WindowBehaviors.Move | Telerik.Web.UI.WindowBehaviors.Close;
RadWindow1.Behaviors = Telerik.Web.UI.WindowBehaviors.Move Or Telerik.Web.UI.WindowBehaviors.Close