This web part is used to place custom developed filters onto your website and connect them to a datasource. The path to the user control implementing the filter must be specified.
For more information and an example demonstrating how to develop a custom filter, please see
Developer's Guide -> Development -> Web parts -> Data source web parts -> Developing custom filters.
Help URL: http://devnet.kentico.com/docs/webparts/index.html?Filter_overview.htm