FUNCTION KEYS IN SCREEN

Hi ALL,

i HAVE A MODAL DIALOG SCRREN , I HAVE TO SAVE DATA AND ONCE SAVED THE SCREEN HAS TO BE INACTIVE FOR INPUT THEN I USED

LOOP AT SCREEN.

SCREEN INPUT = 0.

MODIFY SCREEN.

ENDLOOP.

bUT I HAVE A BACK BUTTON ON THIS TO COME BACK TO NORMAL SCREEN ,BUT WHEN I USE THE ABOVE CODE THE BACK BUTTON ALSO BECOMES INACTIVE,IS THERE A WAY THAT I CAN KEEP BACK BUTTON ACTIVE AND REMAINING THINGS IN ACTIVE.

CAN I HAVE FUNCTION KEYS ON MODAL DIALOG BOX.

THANKS