RadFileExplorer does not offer the required functionality out-of-the-box. However, you can achieve it, by attaching a handler method to the window show event of the RadFileExplorer's windowManager, e.g.:
//get reference to the windowManager
windowManager = oExplorer.get_windowManager();
//attach handler to show event
oWnd.set_behaviors(Telerik.Web.UI.WindowBehaviors.Resize + Telerik.Web.UI.WindowBehaviors.Close);
All the best,
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items.