AutoCAD Inventor :: Hiding Drawingcurves In Assembly Drawingview Through API

I want to hide some drawingcurve in my assembly drawingview,but can't make it.

My code is as follows:

Public Sub HideDrawingcurves()
Dim oDoc As DrawingDocument
Set oDoc = ThisApplication.ActiveDocument
Dim oSheet As Sheet
Set oSheet = oDoc.ActiveSheet
Dim oDrawingCurve As DrawingCurve
Set oDrawingCurve = oDoc.SelectSet.Item(1).Parent
oDrawingCurve.Visible = False
End Sub

I'm reminded that there is no such method as the bolded .How to hide or delete drawingcurves