| 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 | Returns the specified AutoCADBlockDefinition object from the collection. |
| Type | Returns an ObjectTypeEnum indicating this object's type. |
| Name | Description |
| AutoCAD block definitions import | This sample demonstrates importing AutoCAD block definitions from an external dwg file. |