Public Sub SetAt( _
   ByVal Index As Integer, _
   ByVal Value As Double _
) 

public void SetAt(
   int Index, 
   double Value
);

public: void SetAt(
   int Index, 
   double Value
);

public  setAt(
   int Index, 
   double Value
);

public: HRESULT SetAt(
   long Index, 
   double Value
);