PSRV_PRINTER_ATTR_CNX
PSRV_PRINTER_ATTR_CNX, B_STRING_TYPE, true, false,
&& printer->ReadAttrString(PSRV_PRINTER_ATTR_CNX, &connection) == B_OK
printer.WriteAttr(PSRV_PRINTER_ATTR_CNX, B_STRING_TYPE, 0, connection,