对初学者理解c++的抽象继承虚函数等机制相当有用，这是一个画点线多边形的的实例程序。-for beginners to understand the abstract c succession mechanisms such as virtual function very useful. This is a drawing point line polygon examples of the procedure.

Visual c++编写主机端虚拟频谱显示仪！-Visual c++ to prepare the host-side virtual spectrum displays!

c++builder做的，利用虚拟数据进行实时动态曲线绘制，能完美运行，非常好的学习资料-C++builder to do with virtual data, real-time dynamic curve drawing, can run perfect, very good learning materials