How to get CPU usage or disk usage of application using Windows API from C++?

Question

How to proceed to get CPU usage or disk usage of application using API in C++???

I want to get the highest CPU usage or disk usage among the application running on w

Answer 1

Windows 7 already has this built-in, as part of the Resource Monitor (realmon.exe). If you want to find this in code, you can either use the Perf Counter API or create a Realtime ETW consumer against the NT kernel provider.

Answer 2

You look at the Process category performance counters to get per process CPU/Memory/IO or at respective categories (Processor, Memory, Physical/Logical Disk) counters for overall system performance. The values can be accessed via dedicated APIs or from WMI.