关于文件的操作，对于VC++在MFC上平台上有很大的学习作用，里面包含了文件的各项操作，平常使用的读取文件以及存取数据都有详细的说明-This txt introduce every function of file.We can open or close file.Otherwise we can write or read these data from file.

MFC对话框打开一幅图片，并在picture中显示，最后保存图片，过程详尽，有图解-MFC dialog to open a picture and display it in the picture, and finally save pictures and detailed process, graphic

MFC画图程序代码，可画椭圆，直线，矩形，改线宽，打开保存，颜色等-MFC drawing code can draw ellipses, lines, rectangles, change the line width, open the saved, color, etc.