系统钩子（键盘钩子，鼠标钩子等等）已是我们最长用的手段，要做钩子程序就必须用到下面这几个函数使用动态链接库（dll)，即要实现全局系统钩子。这里就这几个函数的参数做一下详细的讲解-Hook (hook the keyboard, mouse, hook, etc.) is the longest we have the means used, the hook procedure must be used to do these functions use the following dynamic link library (dll), that is, to achieve the global system hooks. Here the parameters of these functions in detail what to do