From: Dave Burt <dave@...>
Date: 2005-12-08T00:03:42+09:00
Subject: Win32OLE: Output parameters, Dispatch IDs

Hi,

x1 recently asked about an issue with a WMI script that had an output parameter. 
I guess you can get a result from an output parameter via WIN32OLE#_invoke (with 
VT_BYREF?) if you have the Dispatch ID for the method. But for a few WMI objects 
I've seen recently, I haven't been able to get a WIN32OLE_METHOD instance for a 
lot of methods, even ones that I can invoke. For example:

# Get a Win32_Process WMI object
wmi_svc = WIN32OLE.connect("winmgmts:\\\\.\\root\\cimv2:Win32_Process")
# Try to get the method
wmi_svc.ole_method("Create")  #=> WIN32OLERuntimeError: Not found Create
# Invoke the method
wmi_svc.invoke("Create", "notepad", nil, nil, nil)  #=> (Creates notepad.exe 
process)

That last parameter is an output parameter which should return the PID of the 
created process as a uint32.

Is there a way I can get info on a method like that, and how do I get the result 
of an output parameter?

Cheers,
Dave