如何获取“我的文档”等一些系统文件夹路径？
How to get the path for "My Documents" and other system folders?
获取关于实例的信息，如实例名、文件系统名、TSA PD名和安装路径：db2greg。
Get all information about instance, such as instance name, filesystem name, TSA PD name, and installation path: db2greg.
获取由指定枚举标识的系统特殊文件夹的路径，并使用用于访问特殊文件夹的指定选项。
Gets the path to the system special folder that is identified by the specified enumeration, and USES a specified option for accessing special folders.
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