根据事务代码找User exit

TABLES : tstc, "SAP Transaction Codes(SAP 事务代码)
tadir, "Directory of Repository Objects(资源库对象的目录)
modsapt, "SAP Enhancements - Short Texts(SAP增强-短文件)
modact, "Modifications(修正)
trdir, "System table TRDIR(系统表 TRDIR)
tfdir, "Function Module(功能模块)
enlfdir, "Additional Attributes for Function Modules(功能模块的附加属性)
tstct. "Transaction Code Texts(事务代码文本)

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

SELECTION-SCREEN BEGIN OF BLOCK a01 WITH FRAME TITLE text-001.
SELECTION-SCREEN SKIP.
PARAMETERS : p_tcode LIKE tstc-tcode OBLIGATORY.
SELECTION-SCREEN SKIP.
SELECTION-SCREEN END OF BLOCK a01.

START-OF-SELECTION.
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 = 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:/(12) '事务代码 - ',
13(20) p_tcode,
34(10) '功能 - ' ,
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:/ '用户出口数量:' , sy-tfill.
ELSE.
FORMAT COLOR COL_NEGATIVE INTENSIFIED ON.
WRITE:/(95) '此TCode没有用户出口！'.
ENDIF.
ELSE.
FORMAT COLOR COL_NEGATIVE INTENSIFIED ON.
WRITE:/(95) '事务代码不存在！'.
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.