说明：  win32抛弃了win16的全局内存的概念,每个进程有自己独立的内存空间, 并且不受其他进程影响.这样一来所有代码都只能访问局部资源,但很显然有些 应用必须是全局的,比如你的hook,所以ms必须提供一种折衷的安全的方法.好 在windows中的dll正好可以解决这个问题.
(win32 global win16 abandoned the concept of memory, each process has its own separate memory space, and other processes are not affected. In this way all the code can only access local resources, it is clear that the overall situation must be some applications, such as your hook, so ms to provide a way to compromise the security. Fortunately, the dll is in windows can solve this problem.)