使用cimage输入输出的，大小转换，格式变换的代码-cimage use of the input and output, the size conversion, format conversion code

将窗口保存为JPG、PNG等图片格式，演示了CImage类在VC++中的应用，在VS2010下编译通过。-Save the dialog windows as JPG, PNG file, demonstrated the the CImage class in VC++, compiled by VS2010 under.