win32api exception names?

[G. Willoughby]

Hi,
    See this:

[snip]

def executeFile(event):
    if resultPane.size() > 0:
        try:
            win32api.ShellExecute(0, "open" ,
str(resultPane.get(ACTIVE)),"","",1)
        except EnvironmentError:
            win32api.MessageBox(0,"File can not be opened, right double
click to open\nthe file's directory.", appName, 0, 0)

[snip]

I'm using this function to open a file listed in a Tkinter Listbox widget,
but i've run into some problems. First when i double click on .htm files
listed they work perfectly, opening in Explorer, But when i double click on
.txt files i get this error:

Exception in Tkinter callback
Traceback (most recent call last):
  File "c:\program files\python\lib\lib-tk\Tkinter.py", line 1285, in
__call__
    return apply(self.func, args)
  File "D:\Backup\Python Programs\PyFind\PyFind.py", line 61, in executeFile
    win32api.ShellExecute(0, "open" , str(resultPane.get(ACTIVE)),"","",1)
api_error: (31, 'ShellExecute', 'A device attached to the system is not
functioning.')

i'm trying to handle this exception, but being new to them i dunno what
exception is being raised, the 'except EnvironmentError:' line really isn't
getting it. any ideas?

G.Willoughby