The standard SharePoint site templates delivered by Microsoft include a delegate web control named “SearchBox”. This control is placed on a high-level master page that is inherited by nearly all other pages in each SharePoint site collection. This control creates a simple input field for searching.
In the default Microsoft configuration, the “SearchBox” delegate control creates a search form that targets the default Microsoft search center. The delegate does this by loading the standard Microsoft search-box Web part. However, when you install and activate Ontolica (either the full Ontolica feature for a given site collection or the Search-Box-only feature for a given web application), all affected delegates are retargeted to the Ontolica Web control, which creates a simple Ontolica input form. This control is similar to the Microsoft control, except for the following:

• The Ontolica search box targets the Ontolica search center.
• It formats the query as expected by Ontolica
• It includes referrer information, which enables Ontolica to respond differently based on where the user was when initiating the search (i.e., on which subsite in the collection).
• As with the Microsoft control, the Ontolica control provides a scope drop-down list. Like the referrer, Ontolica uses this to fine-tune the search response with extra filtering and formatting options.

Note, however, that the automatic install, activate and deactivate functionality requires that the delegate control is named “SearchBox”, as in the default SharePoint configuration. If you have customized your site so that it does not include this control, or if you have renamed the control, then you can create your own search box by placing the Ontolica control wherever you need it. The Ontolica Search Box assembly class has the following namespace and name:

See your SharePoint documentation if you are not sure how to make use of the above code to place a web part on your pages.
When you deactivate the Ontolica and/or the Ontolica Search Box feature, then the delegate web control will automatically revert to its default Microsoft behavior as follows:

• Deactivate the Ontolica Search Box feature at the web application level to revert the search box for all site collections that do not have the full Ontolica feature activated.

• Deactivate the full Ontolica feature at the site collection level to revert the search box for each selected site collection belonging to an application where the Ontolica Search Box feature is also deactivated at the web application level.

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