An application retrieving partial results can call the BeginSendRequest and pass either ReturnPartialResults or ReturnPartialResultsAndNotifyCallback as the partialMode parameter.
In most scenarios, use NoPartialResultSupport for better performance and scalability. The use of ReturnPartialResults or ReturnPartialResultsAndNotifyCallback is only recommended in the scenario where the retrieval of partial results is desired. For example, when performing a search with the DirectoryNotificationControl specified, the search results are returned only when changes are made to that object. The search never completes and partial results are returned.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)