how to store the item details of a particular delivery order into a custom table?

Hi all,

I am new to SAP. My scenario is I have created a custom table with some fields related to item details of a particular delivery order,

now i go to t-code VL01N and create a delivery order of a particular sales order but now before save that delivery order I need to transfer
these item details into my custom table.

I have found the BADI -->  LE_SHP_DELIVERY_PROC and inside the method named SAVE_AND_PUBLISH_BEFORE_OUTPUT
i need to write the code.

pls tell me am I doing right or not..

pls giveme the solution.

Thank you.