基于对话框的程序，利用USB接收数据，在对话框中画出相应的频谱图，功能齐全-Based on the dialog box procedure, and use USB receive data, in the dialog box to draw the corresponding spectrum, full-featured

usb口采集数据 进行数据采集 并且绘制曲线 功能很强大-usb port for data acquisition and data collection features a very powerful draw the curve