Getting the process list on win98

[Ron]

I've written a screen saver which opens multiple copies on windows 98. 
I'm trying to check the process list to determine if it is already running.

So far all the example win32 routines I've found, through google, only 
work on newer xp and nt versions of windows. This is the current attempt 
to get the process list on windows 98:

def GetProcessNameList():
     from win32com.client import GetObject
     WMI = GetObject('winmgmts:')
     processes = WMI.InstancesOf('Win32_Process')
     names = []
     for process in processes:
         names += [process.Properties_('Name').Value]
     return names

def IsRunning( filename ):
     n = 0
     for process in GetProcessNameList():
         if process.lower() == filename.lower():
             n += 1
     return n


Then in the startup section:

             filename = os.path.basename(sys.argv[0])
             # Wait for preview window to exit.
	    t = clock()
             while IsRunning( filename) > 1 and clock() < t + 3:
                 sleep(.01)
	    # Start screen saver if only self is running.
             if IsRunning( filename)==1:
                 saver = Screensaver()
                 saver.launchScreenSaver()


Results in this error on windows 98, works fine on windows xp:

Traceback (most recent call last):
   File "Aztec.pyw", line 255, in ?
   File "Aztec.pyw", line 38, in IsRunning
   File "Aztec.pyw", line 29, in GetProcessNameList
   File "win32com\client\__init__.pyc", line 73, in GetObject
   File "win32com\client\__init__.pyc", line 88, in Moniker
pywintypes.com_error: (-2147221014, 'Moniker cannot open file', None, None)

The program is in python v2.3 and packaged using pyexe, and inno setup.