how to refersh a SAP Module pool program

use this code in PBO and in PAI catch the refresh user command and do what ever is required 

MODULE test OUTPUT.

*               WAIT UP TO 10 SECONDS
*                  STARTING NEW TASK 'WAITING'
*                     PERFORM RETURN_FROM_WAIT .
  CALL FUNCTION 'RFC_PING_AND_WAIT'
    STARTING NEW TASK 'WAITING'
    PERFORMING RETURN_FROM_WAIT ON END OF TASK
    EXPORTING
      SECONDS               = 10
    EXCEPTIONS
      COMMUNICATION_FAILURE = 1
      SYSTEM_FAILURE        = 2.


*CALL FUNCTION 'RFC_PING_AND_WAIT' in background task .

*  PERFORM RETURN_FROM_WAIT ON END OF TASK.
*   EXPORTING SECONDS = 10.

ENDMODULE.      

 

 FORM RETURN_FROM_WAIT  USING TASKNAME.

  set user-command 'REFRESH'.

ENDFORM.