about print pool

Hi,all:
I met a print problem as following:
As we know,WindowsNT/2k supports the function of printer-pool, that means we can install several physical printer devices to a single printer in printer server so that a printer pool will be created.To the user, those printers in pools behave as a single printer. When we send a print job to the printer, Windows Printer Server will choice a physical printer from the pool and sent the print job to it.

What i want to ask is that how can i
1.stop the print job in the spooler until i want it to be outputted the in physical printer.
2. how to specify what physical printer in the pools i want to use to make outputs, not let Printer Server decide for me.

Could anyone can give me some hints.
A sample code is better.

Thanks
weiwei