FileDialogs are constructed by RadWindow and ExplorerControl as its content. Explorer control holds navigation tree, autocomplete, filtering combobox, main pane for viewing fodler and files, search box, breadcrumb. You can check all visual parts in the following help article: http://docs.telerik.com/devtools/wpf/controls/radfiledialogs/visual-structure Users might need to put the ExplorerControl in non-window parts of their application (for example in docked RadPane of RadDocking. Also, they might need to override OK/Cancel commands for that purpose.