This page shows some examples of how to integrate gazetteer tools in your site. The information used by these tools comes from distributed web services. All of these examples are configurable in the usual MapBuilder way by adding or removing components or pointing to other web services.
In this case the interaction with the services occurs in a popup window and transfers the results back into a bounding box form in this page. This is done via the "Transfer" button in the popup which calls the setAoiForm(form) Javascript method defined in this page. You can copy this code and/or modify it to populate your own bbox form values.
You can also integrate these tools directly in in your page as shown in this example. (under development)