Printing Issue : Setting Paper feed

How to get the paper feed, to set it and to obtain 开发者_开发知识库the list of available paper feed on a printer ? I need to specify the paper tray number from which the paper has to be printed without  putting up the print dialog box in cocoa?

Any thoughts?

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Though it is an old thread. There aren't may answers about this problem on the internet. I succeeded in making it work by setting the InputSlot key on the [printInfo printSettings] dictionary.

[[myPrintInfo printSettings] setObject:@"Tray5" forKey:@"InputSlot"]

It might or might not work for you as I don't know how printer dependent this setting is.