The Annotations property of IPIValueAttribute
is a read/write property of the PIValue
object. When used as a "get", the property returns a Variant containing the annotation of the
corresponding PIValue object. If there is
no annotation or annotations were not requested at the time of data retrieval,
the Variant will be empty (VT_EMPTY).
The object placeholder is an object expression that evaluates to
an IPIValueAttribute object.
This is a read/write property. It is populated when you retrieve a
PIValue from a PI server or may be used
to set an annotation in a PIValue that could then be sent to the PI server.