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ABL Reference
Handle Attributes and Methods Reference : PRINTER-PORT attribute

PRINTER-PORT attribute

(Windows only)
The currently selected printer port in Windows platforms, and the Unknown value (?) on other platforms.
Data type: CHARACTER
Access: Read-only
Applies to: SESSION system handle
PRINTER-PORT assumes the value for printer port that Windows defines. If someone modifies the value using the SYSTEM-DIALOG PRINTER-SETUP command, PRINTER-PORT assumes the modified value.