| 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 | Value of a property |
| ATX_PropertyValueData | Union of the different possible data types for the 'data' field of an ATX_PropertyValue struct |
| 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 |