How to set a Printer Port in C# on a specified Printer
public static void SetPrinterPort(string printerName, string portName)
{
var oManagementScope = new ManagementScope(ManagementPath.DefaultPath);
oManagementScope.Connect();
SelectQuery oSelectQuery = new SelectQuery();
oSelectQuery.QueryString = @"SELECT * FROM Win32_Printer
WHERE Name = '" + printerName.Replace("\", "\\") + "'";
ManagementObjectSearcher oObjectSearcher =
new ManagementObjectSearcher(oManagementScope, @oSelectQuery);
ManagementObjectCollection oObjectCollection = oObjectSearcher.Get();
foreach (ManagementObject oItem in oObjectCollection)
{
oItem.Properties["PortName"].Value = portName;
oItem.Put();
}
}