www-Sharp contains tool for creating HTML help files (.chm). This tool require Microsoft Help Workshop to be installed. You should also set its location - in application menu choose View\Properties, goto Tools item and enter location of HTML Help compiler - hhc.exe. It should be on the same directory where Html Help Workshop is installed.
www-Sharp help editor is similar to Microsoft Help Workshop but is much more comfortable - it let move items with drag and drop, preview pages and more .