I wrote a monitoring app which probes different parts of the system. Now I look for IIASADMIN service to see status of IIS. But there is not a service named IISADMIN there.
What's the service name of IIS on Windows Server 2012?
The IISAdmin service no longer exists for IIS7 and above. You might want to monitor the new WAS service instead (I'm not implying that WAS is what IISAdmin used to be).
Look at the Inroduction to IIS Architecture for more info.