Blizzard is updating Warcraft 3. Patch 1.29 is being tested now, and once it's released to the general audience, the classic real-time strategy game will finally have widescreen support for modern resolutions..
Yeah, you can register your paper keys to your battle.net account.
Also, I recommend going int your Nvidia or AMD control panel and setting this game to have like super anti-aliasing, and all the bells and whistles. Since it’s so old, that stuff doesn’t slow it down at all, and makes it look great!