customized warning message for closed purchase order

@Daphna Amal -Oracle

Hi,

We have a requirement where a pop up should appear when we enter the PO number in the box when creating a Invoice using Quick Match (Invoice Type).Could you plese suggest what all factors should be considered before proceeding with this cutimization.As far as i am aware the seeded functionality is when we match the PO lines then we can see a pop up with the note that this PO is already closed ,we require this pop up right at the begining of entering the PO number in the Quick Match field.

@Daphna Amal -Oracle  @Cherylriniker-Oracle    @Dilip D.