Wrote this tool when I was setting up my laptop to run Hyper-V. I didn't want to have to open the Hyper-V manager and have a window running all the time, and was planning on using Remote Desktop Client to connect to the VM's so I could map drives and copy/paste in teh VMs. The idea was to have something that sits in the System Tray that allows you to Start, Stop, Save State, and Pause the VMs running on the box.
Source : Jerry Orman