变速齿轮原理是，游戏在刷新画面时会用到时钟来控制刷新速度，有过游戏开发的人都知道，一般游戏锁定1秒30帧，这样会很流畅，人眼有视觉停顿，当速度达到1秒16帧的时候，就是在跑动画了，游戏用到的计时器有大部分是两个windows提供的api函数，一个是::GetTickCount，一个是::timeGetTime，这两个api的原型请查msdn，我们利用hook api 去修改它的值，从而改变游戏速度，工程是一个d-Change gear principle is that the game will refresh the screen refresh rate is used to control the clock, had a game developer knows that, generally 1 second 30 game lock, it will be very smooth, human eyes have visual pause, When the velocity reaches 1 second 16 time is running animation, and game timer are used to provide most of the api function of two windows, one is:: GetTickCount, one is:: timeGetTime, these two api prototype please check msdn, we use the hook api to modify its value, thus changing the game speed, works as a dll！
from：http://www.pudn.com/downloads264/sourcecode/windows/freedic/detail1212495.html