Regarding Making condition lines Disable/Invisible in VA01/VA02

Hi,

My requirement is as follows,

Based on some conditions I need to make the conditions lines in va01/va02 invisible.

For other fields like material description, I am able to acheive this by using the below code in Exit "MV45AFZZ" - USEREXIT_FIELD_MODIFICATION

CASE SCREEN-NAME.

WHEN 'VBAP-ARKTX'.

SCREEN-INPUT = 0.

ENDCASE.

However, Conditions tab is a table control and I not getting a clue of doing this.

Please suggest,

Regards,

Pavan.