How to get the coordinate of a control point using automation?

Question

Suppose I have a hull with 6 surfaces. I want to know the coordinate (x Value to be exact) of the control point (row=1, column=0) of the first surface. how can I get this using automation? 
 I am trying the following code. 
 
 msApp.Design.Surfaces.Item(1).GetControlPoint 1, 0, CPx, CPy, CPz 
 
 But getting this error.

Rounak Niloy · Accepted Answer

Dim msApp As New BentleyModeler.Application

Sub NewPt()
Dim CPx As Double
Dim CPy As Double
Dim CPz As Double
Dim FN As String
msApp.Design.Surfaces.Item(1).GetControlPoint 4, 1, CPx, CPy, CPz
End Sub

How to get the coordinate of a control point using automation?

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