Read-only property that returns the SketchLine3D object that represents a side of the control polygon. The indices correspond to the control polygon edges in order from the start to the end of the spline.
| Name | Type | Description |
| Index | Long | The index of the control polygon side to return. An Index of 1 returns the first edge, with the last side being ControlPointCount -1 since there is one less side than number of control points. |