Collections
Several non-visible objects, called collection objects, are used to organize the object hierarchy. Collection objects are containers for groups of other, related, objects. For example, the AutoAxes collection contains all the AutoAxis objects associated with a graph.
All collection objects, regardless of what the collection contains, can be processed using similar techniques. Thus, you retrieve an object from a collection of plot windows (an AutoDocWindows collection) the same way you retrieve an object from a collection of axes (an AutoAxes collection). Collection objects also provide methods to create new objects.