As we saw in the previous example, there are quite a few controls available to us. The Control class is similar in nature to the Layer class—there is a base Control class which all other control subclasses inherit from. Because most controls provide completely different functionality from one another, the base Control class does not contain a lot of properties.
The official, up to date documentation for this class can be found at http://dev.openlayers.org/docs/files/OpenLayers/Control-js.html.