| Interface | Description | 
|---|---|
| Handle | 
| Class | Description | 
|---|---|
| CompoundHandle | |
| ObjectHandle | |
| PiggybackBoolean | PiggybackBoolean contains both the Piggyback information and the actual
 return boolean value. | 
| PiggybackInt | PiggybackInt contains both the Piggyback information and the actual
 return integer. | 
| PiggybackReturn | Holder class to contain piggyback and return value of exported methods | 
| rAttributeDescription | rAttributeDescription describes the ViewUsage attributes. | 
| RowHandle | |
| SessionInfo | Deprecated since 9.0.5. |