vc下 usb程序USB端口的分析, VC-MFC 硬件-系统 VC,MFC基础类,非技术类,界面,网络编程,进程,线程,DLL,ATL,ActiveX,COM,数据库,硬件,系统,HTML,XML,图形处理,算法,-vc procedures under the USB port usb analysis, VC-MFC hardware- System VC, MFC foundation class, non-technical type, interface, network progr