How to find which process is using a TCP Port in Windows

Today i started my Domino server and the HTTP task doesn´t loaded. The console showed a message indicating the port 80 is in use.

I shutdown the server and search for a process listening on port 80 but how?

Use netstat -ano on the command pronpt.  

You will see thad the PID 7152 is using the TCP port 80.  

Go to taskmanager and add a column to view the pid . I discover that skype was using the port 80. So i start skype after Domino starts.