Answer / vijeta aharwar

In PBO event , loop at screen & modify different screen
element.
eg.-> deactivate a parameter
loop at screen.
if screen-name = 'Material Number'.
screen-Input = 0.
screen-active = 0.
endif.
endloop.

Answer / nagaraj

To change the screen elements dynamically,After the PAI event has triggered and before PBO event is triggering a screen programming done by the execution control.
In this screen programming we use screen table to change the attributes of screen elements

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