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