Doc plz on abap object and Module pool prog

Question

Hi all,
Please any send the details and use full documents on ABAP objects and Module Programming.
Its very orgent for me
THanks and Regards
vamsin
[email protected]

Answer 1

Hi ALL,
Thank you for your replies, I guess I dint convey my question properly,
I have called a Selection-Screen in Module Pool .
These were the steps which i followed to archive this.
1. Created a subscreen area in your screen layout (Main Screen- Module Pool).
2.  In the Top Include of  Module pool program declared a Selection-Screen as a subscreen.
     TOP-INCLUDE.
SELECTION-SCREEN BEGIN OF SCREEN 400 AS SUBSCREEN.
    SELECTION-SCREEN BEGIN OF BLOCK d3 WITH FRAME TITLE text-003.
      PARAMETERS : grdate RADIOBUTTON GROUP r2  DEFAULT 'X' USER-COMMAND FR1.  " GRN date
      PARAMETERS : crdate RADIOBUTTON GROUP r2 .       " Current Date
    SELECTION-SCREEN END OF BLOCK d3.
   SELECTION-SCREEN END OF SCREEN 400.
3.  In the PBO and PAI of the Main Screen called Subscreen.
      PBO
CALL SUBSCREEN SUB_SCREEN_STAPLES INCLUDING 'zprogram' '0400'.
     PAI
CALL SUBSCREEN SUB_SCREEN_STAPLES..
I have to do certain operations when the user selects the radio button on subscreen (which is actually a Selection-Screen).
I have tried to assign the function code  to radio button and as this screen is a Selection-Screen I cannot use PAI and PBO.
Used the below code in TOP-INCLUDE.
TOP-Include
AT SELECTION-SCREEN ON RADIOBUTTON GROUP r2.
  CASE ok_rb.
    WHEN 'FR1' .
      IF crdate = 'X'.
        pdate = sy-datum.
      ELSE.
        pdate = sy-datum + 1.
      ENDIF.
  ENDCASE.
But after executing this logic the flow is going to PAI which is validating the mandatory fields of Module-Pool Screen (which is not part of sub screen), hence not solving my purpose.
Is there any way by which I can Only trigger the AT-Selection screen for the selection screen.
or Any other approach which will solve my purpose.
Thanks a lot for Suggestions and Inputs.