| Built-In Function | Description | IBM i | Windows | Linux | RDML | RDMLX | Notes | 
                            
                                | CLR_MESSAGES
                                     | Clear all messages from RDML program queue. | Y | Y | Y | Y | Y |   | 
                            
                                | GET_MESSAGE
                                     | Gets details of next message from RDML pgm queue. | Y | Y | Y | Y | Y |   | 
                            
                                | GET_MESSAGE_DESC
                                     | Gets the description of a message from a msg file. | Y | Y | Y | Y | Y |   | 
                            
                                | GET_MESSAGE_LIST
                                     | Loads the list with each subsequent message file/message stored in the message table. | N | Y | Y | Y | Y |   | 
                            
                                | ISSUEINQUIRY
                                     | Issue an inquiry message to a message queue. | Y | Y | N | Y | Y |   | 
                            
                                | ISSUEMESSAGE
                                     | Issue a message to a message queue. | Y | Y | Y | Y | Y |   | 
                            
                                | MESSAGE_COLLECTOR
                                     | Nominate function as a message collector. | Y | N | N | Y | N |   |