SAP Finding the user-exits of a SAP transaction code

* Finding the user-exits of a SAP transaction code
*
* Enter the transaction code in which you are looking for the user-exit
* and it will list you the list of user-exits in the transaction code.
* Also a drill down is possible which will help you to branch to SMOD.
report zuserexit no standard page heading.
tables : tstc, tadir, modsapt, modact, trdir, tfdir, enlfdir.
       tables : tstct.
data : jtab like tadir occurs 0 with header line.
data : field1(30).
data : 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.

*---End of Program