Displays a search dialog that allows users to enter a search expression. The web part needs to be placed on the same page with a Smart search results web part, which ensures that results are displayed and specifies the search indexes that should be used.
For details about the syntax that can be entered into search expressions, please refer to
Developer's Guide -> Modules -> Smart search -> Search syntax.
Help URL: http://devnet.kentico.com/docs/webparts/index.html?SearchDialog_overview.htm