C++ Windows OpenProcess problem

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Hi,

I have a serious problem about OpenProcess function (link to msdna).

I need that function to get all process handles, to collect basic information (process name, cpu usage, memory usage) about the currently running processes. The problem is when I build a release version of my application some process handle cannot be opened with this function (debug version open these handles succesfully). I've tried several solution, but some of them have a bottleneck. This "solutions" was:
- Initialize privileges, also need Open Process function, the failure was my application cannot open its own handle.
- Tried other function to get process name and cpu usage (these are ok)

Unfortunately, I cannot found another way to get memory usage of processes, thats is why OpenProcess needs to be solved, but if you have an idea to collect memory usage info without OpenProcess please let me know that or solve the OpenProcess failure.

Sorry about not sharing the program code, but its trade secret currently.

Posted 19-Jul-13 4:36am

dur4N

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Richard MacCutchan 19-Jul-13 11:30am

How can your code be a trade secret when it is merely using the Windows API to get process handles?

Richard MacCutchan 19-Jul-13 11:31am

Are you running your application with administrator privileges?

dur4N 19-Jul-13 11:34am

Good question Smile | :) To be honest, I don't want to get in trouble at my workplace.

dur4N 19-Jul-13 11:35am

Yes I am running with administation privileges

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Sergey Alexandrovich Kryukov · Accepted Answer · 2013-07-19T06:11:00

It's not quite clear, according to your description, what's going on and what you are trying to achieve, exactly; probably you need to enumerate processes:
http://msdn.microsoft.com/en-us/library/windows/desktop/ms682629%28v=vs.85%29.aspx[^],
http://msdn.microsoft.com/en-us/library/windows/desktop/ms682623%28v=vs.85%29.aspx[^].

Alternatively, if you are interested in the information on just one process, you can get the handle of this process outside of this process, on in the process itself. For outside approach, you have to create the process in some other process and obtain the process handle in the parent process: http://msdn.microsoft.com/en-us/library/windows/desktop/ms682425%28v=vs.85%29.aspx[^].

If you want to do it in your current process, you need to obtain your current process handle and do the same: http://msdn.microsoft.com/en-us/library/ms683179%28v=vs.85%29.aspx[^].

—SA