You cannot change this document after you have added it. Continue?

Dear All,

When ever we save the Delivery /AR Invoice, we will get the message like "You cannot change this document after you have added it. Continue?" .

I need to capture this event, becaz i need to post one moe transaction based on this

Eg, If i click "Yes" only i should post the another Entry to User defined Table .If i click "No", that should not happen

How is it possible?

Thanks in advance

Regards

Suresh R