通讯用标准filter设计资料；包括8阶矩形滤波器；零点放置法-communications standard filter design information; 8 bands including rectangular filter; France placed 0.1

一个使用Windows SDK编写的简单画板程序。实现点、线、矩形、椭圆、文字。-a Windows SDK slate prepared by the simple procedure. Implementation point, line, rectangle, ellipse, text.