shell扩展编程代码，是用com的类厂实现的shell扩展编程的功能，实现的当用鼠标右键点击一个文件是，会在上下文菜单中添加一个菜单。-shell expansion of programming code, is the type of plant com realize the expansion of the shell programming features, achieved when using the mouse right-click a file, it will in t