（Image）编写一个读显BMP文件[和其他图象文件]的MDI程序，要求：实现文件过滤、创建滚动视图类、对小位图使子窗口按适应图大小、对大位图支持子窗口的滚动。[可以使用CImage类]-(Image) to prepare a BMP file reading significantly [and other image files] of the MDI process, requirements: file filtering, create a scroll view class of