Multi-line text fields

Hi all,

I have some records that have some multiple lines within a single text 
field. (On top of that, I think I have mixed DOS/UNIX line endings too). 
I'm looking for two functions which can operate on a single field:
  1. number of lines  2. a way to select the first line or to trim to the first line only     (the normal trim function
doesn'tappear to do this)
 

Thanks in advance.
-Mike