Windows process resource usage?

[Addanc]

Is there some way of establishing what system resources a windows process uses. I'm particularly interested in I/O port usage, but any information (e.g DLL usage) would be useful.

 

[VectraMan]

Process Explorer shows you lots of stuff about DLLs and files open. I don't know about IO ports, but it's possible they'll just be included as files.