object

WshNetwork object.

strPrinterName

String value indicating the remote printer's UNC name.

The SetDefaultPrinter method fails when using a DOS-based printer connection. You cannot use the SetDefaultPrinter method to determine the name of the current default printer.

The following code uses the AddWindowsPrinterConnection method to connect a network printer and set it as the default printer.

Set WshNetwork = WScript.CreateObject("WScript.Network")
PrinterPath = "\\research\library1"
WshNetwork.AddWindowsPrinterConnection PrinterPath
WshNetwork.SetDefaultPrinter PrinterPath

var WshNetwork = WScript.CreateObject("WScript.Network");
var PrinterPath = "\\\\research\\library1";
WshNetwork.AddWindowsPrinterConnection(PrinterPath);
WshNetwork.SetDefaultPrinter(PrinterPath);

Reference