| ATX_InterfaceId | Interface ID constant |
| ATX_Property | A property that has a name and a value (the value can be of one of several types) |
| ATX_PropertyValue | Union different possible types the 'value' field of an ATX_Property structure |
| BLT_BaseModule | Base implementation of the BLT_Module interface that other implementation of that interface can inherit from |
| BLT_DecoderStatus | Represents the current status of a BLT_Decoder object |
| BLT_ModuleInfo | Information about a module |
| BLT_Player | Asynchronous client API |