说明：  VB没有提供直接访问低层硬件的控件和方法，一度给对访问硬件感兴趣的编程者带来不便。目前我们可从网上搜索到支持低层硬件访问的DLL和ActiveX控件，通过它们可读写存储器单元、端口，甚至控制硬件中断。下面通过两个利用DLL和ActiveX控件示例介绍VB对低层硬件的 访问控制
(VB does not provide direct access to low-level hardware control and methods, once to the right to access the hardware of interest to programmers inconvenience. At present we can search from the Internet to support low-level hardware access DLL and ActiveX controls, through them, can read and write memory unit, port, and even control the hardware interrupt. The following by two examples the use of DLL and ActiveX controls on low-level hardware description VB Access Control)