IOleClientSite

IOleClientSite is a COM interface in Microsoft's Component Object Model technology. It is implemented by an object called the "client site" and is used by an embedded object (an OLE object) to communicate with its container. The container, which hosts the embedded object, provides the IOleClientSite interface.

Through this interface, the embedded object can request various services from its container. These services include activating or deactivating the object, reporting changes in the object's state or appearance, and requesting information about the container's environment. For example, an embedded object might use IOleClientSite to inform its container that it needs to be redrawn, or that it has been resized. The container, in turn, can respond to these requests by performing the necessary actions.

Key methods within the IOleClientSite interface enable communication about UI responsibilities, such as showing or hiding menus and toolbars, and managing focus. It also facilitates notifications about compound document events. The client site acts as a crucial intermediary, allowing embedded objects to function seamlessly within their host applications, ensuring that the user experience is consistent and the embedded content behaves as expected.