Calibrations can only be removed from the collection when there are no open images that are using them. Trying to remove a calibration that is still in use will result in an E_INVALIDARG exception.
Removing a calibration from the collection changes the collection index associated with all calibrations added after the removed calibration.
The BeforeClose event is raised before a calibration is removed from the collection. If any of the notify clients cancel the removal, then no further clients are notified.
The Close event is raised to notify clients after the calibration is removed from the collection, but before it is given its Release.