19.3 How do I implement a Folder Browser class?
http://www.syncfusion.com/FAQ/WinForms/FAQ_c86c.asp#q700q
Folder Browser component for .NET
http://www.codeproject.com/cs/miscctrl/folderbrowser.asp
HOW TO: Implement a Managed Component that Wraps the Browse For Folder Common Dialog Box by Using Visual C# .NET
http://support.microsoft.com/?kbid=306285