说明：  Win32环境下dll编程原理，介绍了导出和导入函数的匹配，与DLL模块建立链接，使用符号名链接与标识号链接，编写DllMain函数
(Win32 environment dll programming, and introduces the Export and Import of the matching function, DLL modules and links, the use of symbolic name and logo, link to link, to prepare DllMain function)