Luca, you can find a lot of answers to your questions on this discussion group. If you will try to search using key words "excel constants" for example, you will get the link to the following link (among others): http://tinyurl.com/go3qf
IMHO it is good idea to search the web and discussion groups before posting questions (I am not saying it is a bad idea to ask here, I am only trying to show an simple alternative how to get an answers to your questions to you) HTH Regards Petr Jakes -- http://mail.python.org/mailman/listinfo/python-list
