Select and hide bend lines in a drawing

Does anybody know the API code to select a bend line of a viewport in a drawing and then hide it?

A part of the code I 've written:

Set flatview = swdraw.GetFirstView

While Not flatview Is Nothing

If flatview.IsFlatPatternView Then GoTo gevondenSheet2

Set flatview = flatview.GetNextView

Wend

gevondenSheet2:

BendlinesArr = flatview.GetBendLines

Set swSketchSegment = BendlinesArr(0)

swSketchSegment.Select4 True, Nothing <<<<Solidworks crashes with this command

swApp.ActiveDoc.BlankSketch

Is there an other method to hide the bend lines of a sheet metal view?

Thanks.

Henk