Personalization for Invoice Booking of Closed PO lines

Hi folks ,

Need an help to achieve an personalization in the Invoices screen ( Form name APXRMTCH ) , when we have an Purchase order of 5 lines out of 5 lines we have booked the Invoice for 2 lines rest 3 lines still not invoiced .

our client requirement is if we go to the Invoice screen where already 2 lines are booked , if we click on the Match Tab it will fetch all the 5 lines , for the two lines where the invoice is booked if you click on there it will throw couple of error messages but then also it will allow you to book more quantity resulting to over billing , here we want to stop the over booking of the invoices .