The extension for this object class.
[Visual Basic .NET] Public ReadOnly Property Extension As Object
[C#] public object Extension {get;}
[C++]
HRESULT get_Extension(
LPUNKNOWN* Extension
);
[C++]Parameters
Extension [out, retval] Extension is a parameter of type LPUNKNOWN
Product Availability
Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.