"Backup" like file selection control

I'm looking for a .NET class that provides functionality similar to the file selection interface used in file backup programs. I'd like to be able to select individual files or entire directory trees with the class returning the list of files the user selected. I'd like to be able to filter on specific file types also. I'd settle for an active-X control if that's all that's available. Hopefully, the class would handle all the recursion down through the directory structure so all I have to do is open each file and process it.

Cheers
Al