Problem with sub-screen actions on Cancel button

Question

Hi all,
I have a problem with sub-screen.
I created a subscreen (screen sequence in MM01/MM02/MM03). When users leave this screen, I call POPUP_TO_CONFIRM to ask if they want to save the data.
1) My goal is: when they choose Cancel, no actions are performed and users will see the current screen. However, I cannot use command: SET SCREEN 0 or LEAVE TO SCREEN 0 because the system gives an error message:
*SET SCREEN not allowed in subscreens*.
2) How can we determine when the user leaves the screen? which value of SY-UCOMM will be used to check this?
Thanks in advance.

Answer 1

for dis SET SCREEN is not required.
Consider d code given below as n eg:
CALL FUNCTION 'POPUP_TO_CONFIRM'
    EXPORTING
      titlebar              = 'SAVE'
      text_question         = 'SOME _QUS'
      text_button_1         = 'YES'
      text_button_2         = 'NO'
      default_button        = '2'
      display_cancel_button = ' '
    IMPORTING
      answer                = l_ans
    EXCEPTIONS
      text_not_found        = 1
      OTHERS                = 2.
  IF sy-subrc <> 0.
    MESSAGE e066.
  ENDIF.
IF l_ans EQ '1'.    " when yes is pressed
   MODIFY db.
   commit work.
   leave program.
ELSEIF l_ans EQ '2'.  "when no is pressed
    leave program.
ELSE.     " when cancel is pressed
ENDIF.
In above module when Yes is pressed it saves data den leave prog.
As no action is specified for cancel button it will remain on that screen only from which popup is called, in this way ur problem can be solved.
Reward properly.