How to enable extension button of select-options but make it read only

Hi all,
I have select-options with extension on my selection screen. It has to be read only. But when I give screen-input = 0, even the extension button is disabled. So the user cannot see multiple default values of that field. How should I enable the extension button and still make it read-only.
Thanks in advance.
Vasu

Hi, try below sample code:
data: gv_bukrs type bukrs.
SELECT-OPTIONS s_one for gv_bukrs.
at SELECTION-SCREEN OUTPUT.
LOOP AT SCREEN.
    if screen-name = 'S_ONE-LOW' or screen-name = 'S_ONE-HIGH' .
       screen-input = 0.
       MODIFY SCREEN.
    endif.
ENDLOOP.

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How to enable extension button of select-options but make it read only

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