这些类还可以处理输出队列和后台打印文件，回答后台打印文件的消息，执行其他打印相关任务。

These classes can also work with output queues and spooled files, answer messages for spooled files and do other print related tasks.

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这些打印类用于检索后台打印文件、输出队列、打印机以及其他打印资源的列表。

These print classes are used to retrieve lists of spooled files, output queues, printers, and other print resources.

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