With XAMPP version 1.8.2-1 and 1.8.2-2 when I setlocale(LC_ALL ...) for Italy, than when I call the localeconv() for having the setting, all the value are like empty. I don't try with 1.8.3.
Version 1.8.1 with the same code works properly.
The settings are used after in the code for localized version of number and dates.
Good work, thank you for all, Giuseppe.