Number of extensions.
[Visual Basic .NET] Public ReadOnly Property ExtensionCount As Integer
[C#] public int ExtensionCount {get;}
[C++]
HRESULT get_ExtensionCount(
long* Count
);
[C++]Parameters
Count [out, retval] Count is a parameter of type long
Product Availability
Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.