Sometimes you might want to listen for a Process Start and do some Actions.

To start listening, just run the following code:

public void StartProcessMonitoring()
{
	// Create event query to be notified within 1 second of a change in a service
	WqlEventQuery query = new WqlEventQuery("__InstanceCreationEvent", new TimeSpan(0, 0, 1), "TargetInstance isa \"Win32_Process\"");

	// Create the Watcher
	watcher = new ManagementEventWatcher();
	watcher.Query = query;
	watcher.EventArrived += new EventArrivedEventHandler(ProcessStartEvent);
	watcher.Start();
}

The callback could then look like this:

public static void ProcessStartEvent(object sender, EventArrivedEventArgs e)
{
	ManagementBaseObject targetInstance = (ManagementBaseObject)e.NewEvent.Properties["TargetInstance"].Value;
	string processName = targetInstance.Properties["Name"].Value.ToString();
	if (processName == "myprocess.exe")
	{
		// Do whatever you want
	}
}

I created a member for the watcher Object

ManagementEventWatcher watcher;

and closed it when the App closes, otherwise I got a COM Error or something.
Here’s the cleanup Code:

watcher.Stop();
watcher.Dispose();