The Center And Size coclass allows you to change the spatial extent of a map by specifying the center, size and units.
|ICenterAndSize||Provides access to the Center And Size Map Area Interface.|
|IMapArea||Provides access to the Map Area Interface.|
|IPersist||Defines the single method GetClassID, which is designed to supply the CLSID of an object that can be stored persistently in the system. IPersist is the base interface for three other interfaces: IPersistStorage, IPersistStream, and IPersistFile.|
|IXMLSerialize (esriSystem)||Provides access to members that XML serialize and deserialize an object to/from XML.|