Collection Property [Access 2003 VBA Language Reference]
The Collection property returns a reference to the collection that contains an object. Read-only References object.
expression Required. An expression that returns one of the objects in the Applies To list.
The Collection property is available only by using Visual Basic and is read-only.
You can use the Collection property to access the collection to which an object belongs. For example, the Collection property of a Reference object returns an object reference to the References collection.
The Collection property is similar to the Parent property.