I have a script that contain random codes but I am searching for a way in notepad ++ or for a batch-file or any tool that can replace sepcifque codes, here is an example:

Random
If this equal that then you sould do this and do that therefore..
the code should be executed immediatly
--stackb

select * from user_error where object_name = name
select * from user_error where table= randomly

case 1 a = b else c=a
--stacke
Begin with the structure of the data and divide the codes
end with what you know

I want to replace the words between the comments stack b and stack a so the result will be like below

Random
If this equal that then you sould do this and do that therefore..
the code should be executed immediatly
--stackb

The codes here has been replaced,
can you do that ?

case 1 a = b else c=a
--stacke
Begin with the structure of the data and divide the codes
end with what you know

Is there a code in batch file or note pad ++ where I can acheive my result?