The RadHtmlEditorProvider replaces the default DNN HtmlEditor Provider, giving your extra control over content formatting. Now instead of the FreeTextBox control, you can use RadEditor to edit the content of HTML modules, FAQ modules, or any other module that uses the DNN HtmlEditor Provider. With features like Dockable and Floating Toolbars, Multilevel Undo/Redo with Action Trails, New features for pasting from Word, Custom Keyboard Shortcuts, Custom Context Menus, Use External CSS Files, System Modules, Content Filters, Context Menus on Gecko-Based Browsers, Full-Screen Mode, and many more, you won't be disappointed. More about RadEditor for ASP.NET you can learn
here.