Thesaurus entries are added in Developer Studio.
To add a one-way or two-way thesaurus entry:
Open the project in Developer Studio.
In the Project Explorer, expand Search Configuration.
Double-click Thesaurus to display the Thesaurus view.
Click New and select either One Way or Two Way.
Configure the entry in the Thesaurus Entry dialog:
For a one-way entry: type in one term in the "From" field, add one or more "To" terms, and click OK.
For a two-way entry: add two or more "To" terms and click OK.
Save the project.
The Thesaurus view also allows you to modify and delete existing thesaurus entries.