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

public void SetAt(
    int Index,
    double Value
);

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

public void setAt(
    int Index,
    double Value
);

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