changing a piece of code
 

I have bunch of files...and i need to add a line of same code to all of them.

for example in module1 == Procedure1 == i want to find where "ABCD" exists
and in the next line i want to add some code.

Could someone suggest an automated way to do it. I searched cpearson.com and
found some good knowledge about adding/ deleting procedures/modules ...but
could not find anything on modifying a procedure.

Help will be greatly appreciated.
--
Ajit