用VC++做的画图软件，可以用来学习如何画图，有正弦波，三角波，方波例子-VC++ to do with the drawing software, can be used to learn how to draw, there is sine wave, triangle wave, square wave example

显示波形的控件 输出余弦，方波，三角波-Shows the output waveform control, cosine, square, triangle wave