VC++ 实现绘制波形图动态图，类似示波器的界面，信号用正弦信号模拟，可调节显示的幅度档和时间档，可对信号进行暂停观测，可上下左右移动信号波形。-VC++ realize draw oscillogram dynamic figure, such as the scope of the interface, signal with sine signal simulation, which can adjust the display of files and time files, the s