说明：  VC++动态链接库(DLL)编程 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。静态链接库与动态链接库都是共享代码的方式，如 果采用静态链接库，则无论你愿不愿意，lib 中的指令都被直接包含在最终生成的EXE 文件 中了。但是若使用DLL，该DLL 不必被包含在最终EXE 文件中，EXE 文件执行时可以“动 态”地引用和卸载这个与EXE 独立的DLL 文件。静态链接库和动态链接库的另外一个区 别在于静态链接库中不能再包含其他的动态链接库或者静态库，而在动态链接库中还可以 再包含其他的动态或静态链接库。
(VC++ dynamic link library (DLL) programming experienced " no library- static link library- dynamic link library" era in the history of the development of the warehouse. Static link library and dynamic link library code are shared, static link library, whether you would be willing lib instructions are included directly in the resulting EXE file. However, if the use of the DLL, the DLL does not have to be included in the final EXE file, the EXE file execution " dynamic" references and unload the DLL files and EXE. Another difference is that the static link library and dynamic link library can no longer contain static link library dynamic link library or static library, in the dynamic link library can also contain other dynamic or static link library.)