挂钩(HOOK)的基本原理

WINDOWS调用挂接的回调函数时首先会调用位于函数链首的函数，我们只要将自己的回调函数置于链首，该回调函数就会首先被调用。那么如何将我们自己的回调函数置于函数链的链首呢？函数SetWindowsHookEx()实现的就是该功能。-Linked to (HOOK) The basic principle articulated WINDOWS call the callback function when the function will first call at a function of the first chain, we need only its own callback function will be placed in the first chain, the callback function will be the first to be called. How to put our own callback function at the first chain function chain it? Function SetWindowsHookEx () is the realization of the feature.