The control is shipped with a rich set of themes that allow you to easily build slick interfaces with the look-and-feel of Windows Vista, Office 2007, Outlook, etc. The themes can be easily switched using a single property.
In addition to the built-in themes, all RadControls for WinForms come with a feature we call Theme Color Blending, which allows for tweaking the color scheme of a theme, without the need to redo the theme from scratch. The updated color scheme is applied to all Telerik WinForms controls that you are using in your application for a fresh new look. Or you can build a new theme from scratch to fit your exact visual demands by using the Visual Style Builder productivity tool.
Telerik TreeView is also capable of displaying rich text formatting by using standard HTML tags, such as <i>, <b>, and <u>. This is supported on a framework level.