该应用程序在VS6.0下实现了在视图区类进行绘制直线和折线，并且将折线中的点保存在文件中，以便于通过文件数据绘制图形。-The application achieved to draw a straight line and broken line in the view area, and the polyline data stored in the file, in order to draw graphics by data in file.

CButton使用GDI+绘制背景颜色，可以支持各种位图背景PNG、bmp、jpg、Gif等，非常好用-Button control using GDI+ to draw the background color, background bitmap can support PNG, bmp, jpg, Gif, etc., is very easy to use