> How is it possible to determine a process is "not responding" like NT Task
> Manager do?
The heuristic works only for GUI processes, and consists of calling
SendMessageTimeOut() with SMTO_ABORTIFHUNG.
>There is any API call to do the job, or this status is simply a deduction
>based on process counters, like that returned from call to GetProcessTimes
Use SendMessageTimeout with a value of WM_NULL. That's all Task
Manager does to determine this AFAIK.