wht does itcsy refers and how this statment in frm or program works

[Former Member]

hi

when we call a program frm a form we use the below code can anyone explain me the full implication and process and how it works and waht it refers to

fsap script form code : PERFORM GET_CODE IN PROGRAM z_PH3

using USING &vbak-VBELN& changing &ZINT&.....

program code in z_ph3

FORM get_code TABLES inttab STRUCTURE itcsy

outtab STRUCTURE itcsy.

code...

....

..

endforms

WHAT DOES THIS ITCSY REFERS AND HOW IT IS CALLED AND HOW VALUES ARE PASSED AND WHT DOES USING AND CHANGING REFERS HERE AND CAN ANYONE EXPLAIN ME THE WHOLE PROCESS HOW THIS CODE WILL CALL AND WORK AND WHAT DOES THE VARIUS THING MENTION IN IT WORKS LIKE INTTAB OUTTAB SYTRUCTURE ITCSY AAND ITS USE ETC

REGARDS

arora

[Former Member · Accepted solution]

Hi

ITCSY is the structure to create the interface for routines called by a sapscript.

A routine of this kind has to be like this:

FORM <NAME FORM>  TABLES INTAB    STRUCTURE ITCSY
                                                  OUTTAB STRUCTURE ITCSY.

DATA: MY_VAR LIKE ...  

* In INTAB there are the variables inserting by USING:

READ TABLE INTAB WITH KEY NAME = <VARIABLE NAME>.
IF SY-SUBRC = 0.
*---> Get the value from INTAB-VALUE
  MOVE INTAB-VALUE TO MY_VAR.
ENDIF.

* In OUTTAB there are the variables inserting by CHANGING:

READ TABLE OUTTAB WITH KEY NAME = <VARIABLE NAME>.
IF SY-SUBRC = 0.
*---> Set the value to OUTTAB-VALUE
  MOVE MY_VAR TO OUTTAB-VALUE.
  MODIFY OUTTAB INDEX SY-TABIX.
ENDIF.

ENDFORM

Max

[Former Member · Accepted solution]

hi MAx

actually my question was based on how it works internally and how sap process it

form and code i know how to put but i want to understand the processing how it happens? how the data is going and what role does strututure itcsy plays in it and for what other purpose in sap script it is used?

regards

Nishant