USB设备种类比较多，也比较特殊，不同厂商的硬件不同，控制软件也不尽相同（我想主要是ICTL码不同，也不容易查到）。使得访问USB口的设备不象串口并口那么方便。这个例程只是展示了访问的基本方法。其中还有些问题还没有解决，发出来希望大家解决之后能通知我或者发表出来。

参考了USBPort，USBview等代码，一并致谢。

-USB devices are more species, but also rather special, different hardware from different vendors and control software are not the same (I suspect that it is ICTL codes vary, and not easy to detect). Allows access to USB devices do not like the serial port parallel port of convenience. This routine is only shows the basic method of access. It also some issues remain unresolved, issue is resolved to hope that we can notify me or express them.

Reference to USBPort, USBview such code,thanks.