Monitor Serial Port throughput speed using WMI.
This chart used in this application is based on a very cool WPF chart control can be found in http://ligao101.wordpress.com/2007/08/21/another-chart-in-wpf/
Monitoring serial port speed was done using WMI performance counter in C#.
These details are provided for information only. No information here is legal advice and should not be used as such.