本程序是在VC中完成与USB接口通信。读者有必要了解主机是如何识别USB设备以及USB工作的基本原理，这样结合我提供的源码，能轻松完成。-the procedure is completed in VC communication with the USB interface. Readers need to understand is how to identify the host USB devices and USB work of the basic tenets I combine