How to command other process?

[Momergil]

Hello!

I want to create a software that externaly controls other softwares. I know that QProcess is certanly a class that I'm gonna use sometime, but given what I read on its help files I'm not sure it has what I need:

* the possibility to check if the process is running or stoped (stoped == stoped or simply 'not answering')
* the possibility to manipulate the software without having to start it by my software (in other words, I should be able to run it, stop it, command it etc. while not having to start it by my application; it should rather start by the user's choice, and as far as I know QProcess only allows for the user to command the software in question if that one is started with QProcess)
* the possiblity to see the software's parameters (such as how much RAM memory it's consuming)
* (I think the most difficult part) To see if the software is currently being used (i.e. the user is doing something with it) or it is simply opened, with nobody actually using it.

So can I do all this with QProcess (as far as I know, not)? In case the answer being "no", what more will I have to use? And in case "yes", how exactly should I do it? (Because I couldn't figured it out).


Thanks!

Momergil