Determining w3wp process and IIS AppPoolId

When hosting several virtual hosts in IIS, if you go to the Windows Task Manager > Processes, you will notice that the IIS worker process all share the same name as w3wp.exe. To see which w3wp is of which virtual host, one way is:

• In the task manager, select to show PID column.
• In cmd, execute C:\WINDOWS\system32\iisapp.vbs