[python-win32] TerminateProcess issues

[Sean Q. Hendricks]

Hi all,

I've been working on a Python script that executes an external Windows 
program when the user presses a button, and I would like it to stop when 
they press another button.  To that end, I created a class that 
represents the GUI, and there are two methods that are bound to button 
events.  The following is the code for the two methods:

def startEncode(self,event):
        self.newProc = subprocess.Popen(["C:\\Documents and 
Settings\Administrator\My Documents\Hendricks\Current 
Projects\ITAFeedback\Program\producer.exe"])
        #The following line, when uncommented, allows the process to 
terminate with no problem
        #win32api.TerminateProcess(int(self.newProc._handle),-1)
       
def stopEncode(self,event):
        if self.newProc:
            win32api.TerminateProcess(int(self.newProc._handle),-1)

The problem is that I receive the following error when I run the program:

pywintypes.error: (5, 'TerminateProcess', 'Access is denied.')

Now, I'm running as an administrator, so I don't see that as an issue, 
and when I call TerminateProcess from within the same method wherein the 
process is created, there's no problem.  I have seen some email in 
various places that mention that this can occur if a new handle is not 
created by a separate script, but I assume now that this means that even 
from a separate function in the same class, this is not possible.  So, 
is there some way to communicate the process id correctly between two 
methods of a class?  I'd really appreciate any help anyone can give me 
on this.  I've tried many different ways of starting and stopping this 
process, and I have not found an adequate solution, as yet.  I'm on 
Win2k, using Python 2.3 (having installed the subprocess module and the 
win32 extensions).

Sean

-- 
***Please note new email address: shendric at uga.edu***