Hiding code in ABAP programs

Question

I curious if in ABAP is possible to hide code.
What I exacly mean?
In other programming languages e.g. C++ when we want to hide some part of implementation, we just simple make an library (dll file) and we join it to complilation code.
Is included in ABAP similar functionality?`

Answer 1

Hi Tomasz,
   Check this code:
This is not my own code.
PROGRAM ZHIDE NO STANDARD PAGE HEADING.
This program hides any ABAP's source code and protects it with a
password in this source code. So the first candidate to be hidden
should be ZHIDE itself.
After hiding, you can still run the abap (the load version is intact)
but it cannot be displayed, edited, traced, transported or generated.
If the ABAP is not hidden, the program hides it, if it is hidden, it
unhides it.
To execute this program, change the user name and password in this
source code first.
SELECTION-SCREEN BEGIN OF BLOCK BLOCK.
SELECTION-SCREEN BEGIN OF LINE.
SELECTION-SCREEN COMMENT 1(8) PWD.
SELECTION-SCREEN POSITION 35.
PARAMETERS: PASSWORD(8) MODIF ID AAA.
SELECTION-SCREEN END OF LINE.
PARAMETERS: PROGRAM(8).
SELECTION-SCREEN END OF BLOCK BLOCK.
AT SELECTION-SCREEN OUTPUT.
LOOP AT SCREEN.
IF SCREEN-GROUP1 = 'AAA'.
SCREEN-INVISIBLE = '1'.
MODIFY SCREEN.
ENDIF.
ENDLOOP.
INITIALIZATION.
PWD = 'PASSWORD'.
START-OF-SELECTION.
TABLES: TRDIR.
User name and passsword check
IF SY-UNAME <> 'SAP' OR PASSWORD <> 'PASSWORD'.
WRITE: / 'Wrong password'.
EXIT.
ENDIF.
SAP owned?
IF NOT PROGRAM CP 'Z' AND NOT PROGRAM CP 'Y'.
WRITE: / 'Do not hide original SAP programs!'.
EXIT.
ENDIF.
Exists?
SELECT SINGLE * FROM TRDIR WHERE NAME = PROGRAM.
IF SY-SUBRC <> 0.
WRITE: / 'Program does not exists!'.
EXIT.
ENDIF.
Does it have a current generated version?
DATA: F1 TYPE D, F3 TYPE D.
DATA: F2 TYPE T, F4 TYPE T.
EXEC SQL.
SELECT UDAT, UTIME, SDAT, STIME INTO :F1, :F2, :F3, :F4 FROM D010LINF
WHERE PROG = :PROGRAM
ENDEXEC.
IF F1 < F3 OR ( F1 = F3 AND F2 < F4 ).
WRITE: / 'The program has no recent generated version!'.
EXIT.
ENDIF.
Compose a new program name
DATA: NEW_NAME(8), I TYPE I, J TYPE I.
NEW_NAME = PROGRAM.
DO 8 TIMES.
I = SY-INDEX - 1.
NEW_NAME+I(1) = '_'.
Search for acceptable program name variations
J = 0.
SELECT * FROM TRDIR WHERE NAME LIKE NEW_NAME.
J = J + 1.
ENDSELECT.
IF J = 1.
EXIT.
ENDIF.
NEW_NAME = PROGRAM.
ENDDO.
Cannot generate appropriate program name
IF J > 1.
WRITE: / 'Cannot generate appropriate program name'.
EXIT.
ENDIF.
Check if it is already in d010s (already hidden)
DATA: F5(8).
EXEC SQL.
SELECT PROG INTO :F5 FROM D010S WHERE PROG = :NEW_NAME
ENDEXEC.
IF F5 IS INITIAL.
There is no such hidden program, hide it
EXEC SQL.
UPDATE D010S SET PROG = :NEW_NAME WHERE PROG = :PROGRAM
ENDEXEC.
ELSE.
There is already a hidden program there, unhide it
EXEC SQL.
UPDATE D010S SET PROG = :PROGRAM WHERE PROG = :NEW_NAME ENDEXEC.
ENDIF.