由于DirectShow功能强大，文档非常多，初学者很难一下子就掌握；而对于熟练使用者来说，也会觉得有许多操作虽然简单但非常烦琐，往往一个小小功能的程序，都要重复许多操作；针对这种情况，RedCode小组开发DSBase SDK，把经常用的操作封装成DLL，方便用户进行调用,AppWizard has created this DSDemo application for you.　This application
not only demonstrates the basics of using the Microsoft Foundation classes
but is also a starting point for writing your application.