Any object within the Multiframe automation model that is stored within a collection will have an Index and a Number property.  The index of the object represents the position of the object in its parent collection.  As the collections are ordered in the same way items are numbered within Multiframe, the index is in fact the same as the number of the object in the Multiframe user interface.  If items are deleted from a frame, the index of an object will always be updated accordingly.

The Number property of an object currently returns the number of the object as used within Multiframes user interface.  As this is the same as the items index, the Number and Index property return the same value.  Future versions of Multiframe may allow the user to define the number of an item in which case the number need not be unique or part of a continuous numbering scheme. For this reason it is suggest that the Number properties is used when generating output such as reports.