| Name | Description |
| Copy | Creates a copy of this BSplineSurface object. The result is entirely independent and can be edited without affecting the original BSplineSurface object. |
| GetBSplineData | Get the data defining this B-spline. |
| GetBSplineInfo | Gets general information about the definition of the spline, including its order, number of poles and knots, and its rational, periodic, closed, and planar states. |
| PutBSplineInfoAndData | Sets the definition data of the spline surface. |
| Name | Description |
| Evaluator | Gets the surface evaluator for this surface. |
| PoleAtIndex | Indicates the pole coordinate point at the specified UV indices into the spline's pole array. |