File extension.
[Visual Basic .NET] Public Function GetExtension ( _ ) As String
[C#] public string GetExtension ( );
[C++]
HRESULT GetExtension(
BSTR* Extension
);
[C++]Parameters
Extension [out, retval] Extension is a parameter of type BSTR
Product Availability
Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.