Key field.
[Visual Basic .NET] Public Function get_KeyField ( _ ByVal Index As Integer _ ) As String
[C#] public string get_KeyField ( int Index );
[C++]
HRESULT get_KeyField(
long Index,
BSTR* pName
);
[C++]Parameters
Index [in] Index is a parameter of type long pName [out, retval] pName is a parameter of type BSTR
Product Availability
Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.