|In Windows XP, you could never maximize Hearts, at least not conventionally and to the version of Hearts that comes with Windows XP.|
In Windows 7, you can.
Judging by the username chosen, I'm guessing this was not a legitimate question but instead a ploy to advertise a website.
Apologies if I don't respond to your reply immediately. I don't check this site daily, but you're welcome to PM me as a reminder.