Cheating? (Warcraft 3, by the way, not World of Warcraft) The game already lets you use either arrow keys to scroll around and look at different parts of the map, or you can just click the minimap to instantly jump to a different spot. It even lets you adjust how fast the scroll goes, and you can edit the config file to adjust it higher than the in-game GUI maxes out at. It doesn't let you get anywhere faster than you could get by just clicking the spot, I just generally prefer to use the keyboard.
The point is, you can repeat keypresses faster, in whatever program -- no reason to focus on ways to use it to cheat/hack, with my prime example probably being: scrolling through webpages faster.
If you go into the Windows control panel, under Keyboard, there are options just like this, this keyrate program just gives you more control over it.