thank you alex, i have odoo installed, on my win7, and i want to register new products with ean 13, using Barcode Scanner, i can do that in my computer for warehouse?

Barcode scanners usually works like a keyboard. If you want to create a new product you have to set its barcode and you can write it with keyboard or just scan de barcode with the ean13 field clicked inside the product form. If you want to do a inventory with a barcode scanner I think there is no solution out of the box, but maybe I am wrong I don't know everything pretty well.