应用程序可用其执行日志传送配置中的备份、复制和还原操作以及相关的清除任务，而无需运行备份、复制和还原作业。

Used by applications to perform backup, copy, and restore operations and associated clean-up tasks for a log shipping configuration without running the backup, copy, and restore jobs.

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详细给出了备份和还原的具体思路和类实现，存储过程和游标在还原中的应用。

Finally, the detailed idea and class implementation to backup and restore database as well as the application of stored procedure and cursor in restoring database are given.

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