Setting the IncludeAttributeMask property determines the type of Folders that control displays. This can be quite selective. The value should be a combination of Folder item attribute values. A complete list of these values is found in the AttributesEnum type. Use the IncludeFolder property to customize the list of folders being displayed in the control.

Example, selecting folders with new items:

ExFolderView1.IncludeAttributeMask = NewContent Or IsFolder Or IsFileSystem