Retrieves the change point identifier.
- pVal [out]
Change point identifier. The identifier is a count of the changes to the file system image since its inception.
S_OK is returned on success, but other success codes may be returned as a result of implementation. The following error codes are commonly returned on operation failure, but do not represent the only possible error values:
Pointer is not valid.
An application can store the value of this property prior to making a change to the file system, then at a later point pass the value to the IFileSystemImage::RollbackToChangePoint method to revert changes since that point in development.
An application can call the IFileSystemImage::LockInChangePoint method to lock the state of a file system image at any point in its development. Once a lock is set, you cannot call RollbackToChangePoint to revert the file system image to its earlier state.
Minimum supported client
|Windows Vista, Windows XP with SP2 [desktop apps only]|
Minimum supported server
|Windows Server 2003 [desktop apps only]|