摘 要: 本文介绍了DLL技术在Windows编程中的基本运用方法及应用，给出了直接内存 访问及端口I/O的两个实用DLL的全部源代码。-Abstract : This paper presents a DLL in Windows programming using the basic method and the application is a direct memory access and I / O port in the two all practical DLL source c