I believe all of you were searching for a list of available user exits that are triggered after a specific transaction code is executed. Here I’d like to present simple program, that will discover and display exactly that – list of available user exits for given TCode.

TABLES:
  tstc, tstct,
  tadir, trdir, tfdir, enlfdir,
  modsapt, modact.

DATA:
  jtab LIKE tadir OCCURS 0 WITH HEADER LINE,
  field1(30),
  v_devclass LIKE tadir-devclass.

PARAMETERS:
  p_tcode LIKE tstc-tcode OBLIGATORY.

SELECT SINGLE *
  FROM tstc
  WHERE tcode EQ p_tcode.
IF sy-subrc EQ 0.
  SELECT SINGLE *
    FROM tadir
    WHERE pgmid = 'R3TR' AND
          object = 'PROG' AND
          obj_name = tstc-pgmna.

  MOVE tadir-devclass TO v_devclass.

  IF sy-subrc NE 0.
    SELECT SINGLE *
      FROM trdir
      WHERE name = tstc-pgmna.

    IF trdir-subc EQ 'F'.
      SELECT SINGLE *
        FROM tfdir
        WHERE pname = tstc-pgmna.

      SELECT SINGLE *
        FROM enlfdir
        WHERE funcname = tfdir-funcname.

      SELECT SINGLE *
        FROM tadir
        WHERE pgmid = 'R3TR' AND
              object = 'FUGR' AND
              obj_name EQ enlfdir-area.

      MOVE tadir-devclass TO v_devclass.
    ENDIF.
  ENDIF.

  SELECT *
    FROM tadir
    INTO TABLE jtab
    WHERE pgmid = 'R3TR' AND
          object = 'SMOD' AND
          devclass = v_devclass.

  SELECT SINGLE *
    FROM tstct
    WHERE sprsl EQ sy-langu AND
          tcode EQ p_tcode.

  FORMAT COLOR COL_POSITIVE INTENSIFIED OFF.
  WRITE:/(19) 'Transaction Code - ',
       20(20) p_tcode,
       45(50) tstct-ttext.
  SKIP.

  IF NOT jtab[] IS INITIAL.
    WRITE:/(95) sy-uline.
    FORMAT COLOR COL_HEADING INTENSIFIED ON.
    WRITE:/1 sy-vline,
           2 'Exit Name',
          21 sy-vline ,
          22 'Description',
          95 sy-vline.

    WRITE:/(95) sy-uline.

    LOOP AT jtab.
      SELECT SINGLE * FROM modsapt
        WHERE sprsl = sy-langu AND
              name = jtab-obj_name.

      FORMAT COLOR COL_NORMAL INTENSIFIED OFF.
      WRITE:/1 sy-vline,
             2 jtab-obj_name HOTSPOT ON,
            21 sy-vline ,
            22 modsapt-modtext,
            95 sy-vline.
    ENDLOOP.

    WRITE:/(95) sy-uline.
    DESCRIBE TABLE jtab.
    SKIP.
    FORMAT COLOR COL_TOTAL INTENSIFIED ON.
    WRITE:/ 'No of Exits:' , sy-tfill.
  ELSE.
    FORMAT COLOR COL_NEGATIVE INTENSIFIED ON.
    WRITE:/(95) 'No User Exit exists'.
  ENDIF.
ELSE.
  FORMAT COLOR COL_NEGATIVE INTENSIFIED ON.
  WRITE:/(95) 'Transaction Code Does Not Exist'.
ENDIF.

AT LINE-SELECTION.
  GET CURSOR FIELD field1.
  CHECK field1(4) EQ 'JTAB'.
  SET PARAMETER ID 'MON' FIELD sy-lisel+1(10).
  CALL TRANSACTION 'SMOD' AND SKIP FIRST SCREEN.

Program output for i.e. TCode MM01: