To block delivery in VL01N and VL02N using LE_SHP_DELIVERY_PROC Badi

Hello Everyone

I want to update the Delivery block (LIKP-LIFSK) and show a popup information message in VL01N and VL02N once the 'Save' button is pressed in both these transactions. I have some checks which I'm doing and if the Outbound delivery exists within these checks, then only the pop up should trigger.

Here is my code.

IF NOT ct_xlips[] IS INITIAL.

SELECT COUNT(*) FROM zreachregulation FOR ALL ENTRIES IN ct_xlips WHERE matnr = ct_xlips-matnr.

IF sy-subrc = 0.

cs_likp-lifsk = 'YT'.

CALL FUNCTION 'POPUP_FOR_INTERACTION'

EXPORTING

HEADLINE = text-001

TEXT1 = text-002

TEXT2 = text-003

TICON = 'I'

BUTTON_1 = text-005.

IF SY-SUBRC <> 0.

MESSAGE text-004 TYPE 'E'.

ENDIF.

ENDIF.

ENDIF.

I put this code in the method 'READ_DELIVERY', but this doesn't trigger with the Save button and also doesn't work with VL01N.

How do I do the updation of delivery block using this Badi? in which method should I write my code?

Please help.