基于对话框的 MFC 工程，主要是GDI 对象之画笔 CPen的代码：在对话框上有一个 Picture 控件，将此控件的背景填充为黑色；启动一个定时器，每次定时器到时，所有波形数据都前移一个单位，并获取一个 80 以内的随机数作为波形的最后一个数据，然后以绿色画笔在绘图控件上绘制波形。这样就实现了波形的绘制及动态变化。(Dialog based MFC project, GDI is the main object of the brush CPen Code: there is a Picture in the dialog box controls, this control will fill the background is black; start a timer timer, every time when all waveform data moves one unit, and to obtain a random number less than 80 as the last a waveform data, and then draw the waveform in the drawing control on green brush. In this way, the waveform is drawn and the dynamic changes are realized.)