Thanks gmayor, almost working

However I did not mention the following relevant notes

1) The cells do have more lines (number not fixed), so it is necessary to change the control alowing to exit the loop.
2) font size in each cell is not the same for all lines.

What I want is to avoid the break of originary lines. The final lines of my cell should be those broken by enter, and not those broken by their excessive length.
If easier to do, a proxy for this is result is avoiding the breaking of a word, since 99% of problematic lines are composed by a single word.

is it possible to get this?

Thanks
Marco