Have you tried pressing num-lock and hitting the key (using the keyboard 
overlay) as you describe below? The number is written on the front of the 
key.  See your user manual for details
"Giuseppe Chielli" <giuchiel@NOSPAMlibero.it> wrote in message 
news:hpsZf.72022$A83.1722709@twister1.libero.it...
> Hi to everyone! I have a Tecra notebook, I'd like to know how can I type 
> some characters just using their ascii code, for example alt+123 to type 
> "{" and so on...
> Thanks a lot in advance to everyone.
>
> Giuseppe from Italy