Multiple Built-In Views
Views that belong to this category emulate the explorer bars found in Microsoft Explorer. Groups are arranged one under another. End-users can expand/collapse each group individually. These Views can be painted using regular paint styles (emulating the look and feel of the navigation bars in MS Explorer), as well as any skinning paint scheme.
The DevExpress VCL NavBar allows you to incorporate the traditional Side Bar's behavior into your applications with ease and emulate the look and feel of MS Outlook (XP, 2000, or 97) and Visual Studio.