| Name | Description |
| Add | Method that creates a new VertexDefinition within the associated SurfaceBodyDefinition. |
| Name | Description |
| Application | Returns the top-level parent application object. When used the context of Inventor, an Application object is returned. When used in the context of Apprentice, an ApprenticeServer object is returned. |
| Count | Property that returns the number of items in this collection. |
| Item | Property that returns an item from the collection. The index of the first item in the collection is 1. |
| Type | Returns an ObjectTypeEnum indicating this object's type. |