how to add or enhance a new field (credit control area) into F-32 transaction initial screen

Hi,

I searched many links from SCN but I am not get the exact solution for this enhancement.

I like to know, what is the exact BADI or Screen Exit for add the new field into the F-32 initial screen.

   
Please share the step by step procedure with screen shots, if you have aware on this enhancement.

Appreciated for the quick response.

F-32 Transaction

Regards

Srihari