Getting handles of all processes in C#

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Hello, i wrote this loop to get all processes by using Process.GetProcesses()

C#

foreach (var currentProcess in Process.GetProcesses())
{

    bool is32bit = false;
    IntPtr hprocess = OpenProcess((PROCESS_ALL_ACCESS | PROCESS_VM_OPERATION | PROCESS_VM_WRITE), false, currentProcess.Id);
    IsWow64Process(hprocess, out is32bit);

    if (hprocess != IntPtr.Zero)
    {
        if (is32bit = false)
        {
            Console.WriteLine("{0}: {1} - 64 BIT", hprocess, currentProcess.ProcessName);
        }
        else
        {
            Console.WriteLine("{0}: {1} - 32 BIT", hprocess, currentProcess.ProcessName);
        }
    }


    CloseHandle(hprocess);
}

I am facing some issues...

1) I get 0 instead of a handle IntPtr on many processes
2) There where i don't get 0, i get the same handle for more than one process (the sample output below)
3) Only 32bit processes are beign enumerated unfortunately (the sample output below)

This is the sample output. ANY help would be appreciated!!!

556: putty - 32 BIT<br />
556: vmware-unity-helper - 32 BIT<br />
556: Greenshot - 32 BIT<br />
556: RAVCpl64 - 32 BIT<br />
556: notepad - 32 BIT<br />
556: chrome - 32 BIT<br />
556: chrome - 32 BIT<br />
556: chrome - 32 BIT<br />
556: chrome - 32 BIT<br />
556: vmplayer - 32 BIT<br />
556: chrome - 32 BIT<br />
556: chrome - 32 BIT<br />
556: chrome - 32 BIT<br />
556: chrome - 32 BIT<br />
556: MOM - 32 BIT<br />
556: chrome - 32 BIT<br />
556: chrome - 32 BIT<br />
564: TeamViewer - 32 BIT<br />
564: chrome - 32 BIT<br />
568: calc - 32 BIT<br />
568: explorer - 32 BIT<br />
568: conhost - 32 BIT<br />
568: taskhostex - 32 BIT<br />
568: chrome - 32 BIT<br />
568: xampp-control - 32 BIT<br />
568: chrome - 32 BIT<br />
568: conhost - 32 BIT<br />
568: chrome - 32 BIT<br />
568: notepad++ - 32 BIT<br />
568: chrome - 32 BIT<br />
568: chrome - 32 BIT<br />
568: chrome - 32 BIT<br />
568: chrome - 32 BIT<br />
568: chrome - 32 BIT<br />
568: chrome - 32 BIT<br />
568: AdobeIPCBroker - 32 BIT<br />
568: chrome - 32 BIT<br />
568: conhost - 32 BIT<br />
568: IntelliTrace - 32 BIT<br />
568: chrome - 32 BIT<br />
568: bdwtxag - 32 BIT<br />
568: chrome - 32 BIT<br />
568: chrome - 32 BIT<br />
568: MSBuild - 32 BIT<br />
568: CCC - 32 BIT<br />
568: vprintproxy - 32 BIT<br />
568: chrome - 32 BIT<br />
568: putty - 32 BIT<br />
568: chrome - 32 BIT

Posted 17-Dec-14 8:26am

Konstantinos Karakatsoulis

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Sergey Alexandrovich Kryukov 17-Dec-14 14:52pm

How about just thinking for a minute? :-)
—SA

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Sergey Alexandrovich Kryukov · Accepted Answer · 2014-12-17T08:49:00

First of all

C#

if (is32bit = false)

is both buggy (should be '=='; comparison, not assignment you wrote) and silly, because is32bit is already Boolean. Should be:

C#

if (is32bit)
    // ...

Also, you should not open the process to get a handle. Instead, use currentProcess.Handle:
http://msdn.microsoft.com/en-us/library/system.diagnostics.process.handle%28v=vs.110%29.aspx[^].

Probably you need to show both Handle and Id, or, even better, Id only, because Handle is nearly useless to from the user's standpoint. Only the Id is good for using in different processes; this is the process-independent (system-wide) ID of a process. Handles of the same process obtained in the address spaces of different application domains will be different numerical values.

—SA