可以简单的把DLL看成一种仓库，它提供给你一些可以直接拿来用的变量、函数或类。在仓库的发展史上经历了“无库－静态链接库－动态链接库”的时代。-The DLL can be simple as a kind of warehouse, it offers you some of the variables can be used to use, function or class. History of the development in the warehouse through the " no library- static link library- Dynamic Link Library"　era.