Parameters
- currentItem
- The FileSystemItem object being processed.
- targetItem
- The eventual target FileSystemItem object being added to the list of items.
If both currentItem and targetItem are null, the total number of items to process is incremented, but no ItemPair is added to the list. In this case, the caller is now responsible for calling OnProcessingNewItem the same number of times, and explicitly call OnCompletion when done, since the final call to GetNextItemPair (which returns null) won't complete the progression.
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2