Update : please excuse my following rant, it concerns Win32::PerfLib, while shonorio is really asking about Win32::PerfMon , a module that I didn't know but actually exists.
It's still possible to access counters with Win32::PerfLib , but PerfMon looks much simpler .

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Hello,

The win32 perflib data structure is very close to hell !

If your are using Win32::PerfLib ( and not PerfMon as you say) the return value of the method you use has no sense other than failure (0) or success (anything but 0).
The interesting results are obtained in a hash that you pass as a reference in the call to the method.
Look at the docs : 

$ok = Win32::PerfLib::GetCounterNames($server,$hashref)

[download]
Then you have a reference to an hash in $hashref .
The meanings of the keys of this hash are described in the docs.
It gets nasty because most of these keys point to other hashes that in turn point to hashes .
There is seven levels of such hashes in this so-called "structure" ...
... Don't use it if you don't have to ;)

Hope this helps,
zlr .

In reply to Re: Win32::PerfMon get no instances or objects name by ZlR
in thread Win32::PerfMon get no instances or objects name by shonorio

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