Use the IncludeFilesInFolder property to include files when expanding a folder. The IncludeFilesInFolder property has effect only if the IncludeFiles property is True, and ExpandFolders property is True. The ExpandFolders property retrieves or sets a value that indicates whether the control expands the folder objects. The IncludeFilter and ExcludeFilter properties filters the files being included in the list. Use the ExpandOnDblClk property to expand or collapse a folder when user double clicks the folder. Use the ExploreFromHere property specifies the root folder for the control.