The usage notes of a vertical coordinate system.
[Visual Basic .NET] Public ReadOnly Property Usage As String
[C#] public string Usage {get;}
[C++]
HRESULT get_Usage(
BSTR* Usage
);
[C++]Parameters
Usage [out, retval] Usage is a parameter of type BSTR
Product Availability
Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.