在Win32操作系统（包括Win9X、Windows NT、Windows 2000）不但有方便的图形用户（GUI）界面，微软还为windows用户界面保留了强大的可扩充性。其中对于Windows界面的操作环境（这里称为外壳Shell），微软提供了一种称为外壳扩展（Shell Extensions）的功能来实现文件系统操作的可编程性。-In the Win32 operating system ( including Win9X, Windows NT, Windows 2000 ) is not only a convenient graphical user interface ( GUI ), Microsoft Windows user interface retains strong expandability. The Windows interface operating environment ( referred to here as the shell Shell ), Microsoft provides a called Shell Extensions ( Shell Extensions ) to achieve the functions of file system operation programmability.