I'm following this tutorial about building a multilingual web sites using PHP gettext http://onlamp.com/pub/a/php/2002/06/13/php.html
I understand the tutorial until this part:
After you have the directories all prepared, it's time to create the actual "pot" file, as it is usually referred to: the messages.po file. To do this, you will need to have PHP files that use the gettext() function to "mark" strings to be translated and use the xgettext command.
$ xgettext -n *.php
Do I have to write that in the command line? In which folder do I have to be when I execute that command? Is that the Linux version of the command or for Windows?
(I enabled the gettext extension in my wamp ini file) Do I have to download gettext utilites from the GNU web page in order to create .po files?