Current cache extent.
[Visual Basic 6.0] Property CacheExtent As IEnvelope
[Visual Basic .NET] Public ReadOnly Property CacheExtent As IEnvelope
[C#] public IEnvelope CacheExtent {get;}
[Java] public getCacheExtent ( IEnvelope ppEnvelope )
[C++] HRESULT get_CacheExtent( IEnvelope** ppEnvelope );