AFTER DIALOG block
The AFTER DIALOG block is executed one time as
the last trigger when the             DIALOG instruction
terminates, when performing an ACCEPT             DIALOG instruction.
Dialog finalization code can be implemented in this          block.
The dialog terminates when an ACCEPT DIALOG or EXIT
DIALOG          control instruction is executed. However,
the AFTER DIALOG block is              not executed
if an EXIT DIALOG is performed.
If you execute one of the following control instructions in an AFTER
DIALOG block, the dialog will not terminate and it will give
control back to the user:
NEXT FIELDNEXT OPTIONCONTINUE DIALOG
In the next example, the AFTER DIALOG block checks
whether a field value is correct and gives control back to the dialog
if the value is wrong:
   ON ACTION accept
      ACCEPT DIALOG
   ...
   AFTER DIALOG
     IF NOT cust_is_valid_status(p_cust.cust_status) THEN
        ERROR "Customer state is not valid"
        NEXT FIELD cust_status
     END IF