In Tip 049, we used:
NET USE LPTx: \\computername\sharename /PERSISTENT:YES
to enable a DOS app to print to a network printer.
You can also print directly to a printer share by using:
print /d:\\<printserver>\<sharename> <drive>:\<path>\<filename>
where <drive>:\<path>\<filename> is the full path to the file you wish to print.