It will run very fast on large data sets.

Hi skywriter
I'm not used to work with large data sets, so...normaly I don't care about speed.
I'd like to learn why your idea of comparing inside the array is faster than comparing cells themselves.
As far as I can see, there is the main difference between both codes

Vicho

It was a good idea your aproach for lc and lr, as it covers the posibility of empty cells inside the db.