Acknowledges an event reported to a Resource Manager (RM)
    participant or Resource Manager instance (RMI).

    Format

      SYS$ACK_EVENT  [flags] ,report_id ,report_reply [,[reason]

                     ,[beftime] ,[afttime] ,[part_name]

                     ,[rm_context], [timout]]

    C Prototype

      int sys$ack_event  (unsigned int flags, unsigned int report_id,

                         int report_reply,...);