The following table provides summary descriptions of the AutoLISP dictionary functions.
Dictionary functions  | 
                  |
|---|---|
Function  | 
                     Description  | 
                  
(vlax-ldata-delete dict key)  | 
                     Erases AutoLISP data from a drawing dictionary  | 
                  
(vlax-ldata-get dict key [ default-data])  | 
                     Retrieves AutoLISP data from a drawing dictionary  | 
                  
(vlax-ldata-list dict)  | 
                     Lists AutoLISP data in a drawing dictionary  | 
                  
(vlax-ldata-put dict key data)  | 
                     Stores AutoLISP data in a drawing dictionary  | 
                  
(vlax-ldata-test data)  | 
                     Determines whether data can be saved over a session boundary  |