Public Function AddXY( _
   ByVal xValue As Object, _
   ByVal ParamArray yValue() As Double _
) As Integer

Dim instance As DataPointsCollection
Dim xValue As Object
Dim yValue() As Double
Dim value As Integer
 
value = instance.AddXY(xValue, yValue)

public int AddXY( 
   object xValue,
   params double[] yValue
)