printer-port-name

Arguments: printer

Returns a string such as "LPT1:" that names the port to which a printer stream will print. If the printer stream is printing to a file rather than a printer (as when the user selects the "Print to File" check-box on the Print Job dialog), then the port-name property of the printer stream will return nil rather than a string, and the filename property of the printer stream will return the path namestring of the file being printed to; otherwise filename returns nil and port-name returns a port-name string.

The port-name value is determined by the end user's choice of printer on the Print Job dialog that appears when a printer stream is opened, or according to the current Windows printer if the Print Job dialog is bypassed.

printer-port-name is a property of the printer class.

This generic function is not setf'able. You must specify a value for this property when a printer stream is created with open-stream using the :port-name initarg.

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Created 2019.8.20.