[pywin32-bugs] [ pywin32-Bugs-887212 ] Exception raised accessing REG_EXPAND_SZ type in registry

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Bugs item #887212, was opened at 2004-01-29 19:43
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Category: com
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Phil Rittenhouse (prittenh)
Assigned to: Nobody/Anonymous (nobody)
Summary: Exception raised accessing REG_EXPAND_SZ type in registry

Initial Comment:
I ran into two problems using Makepy and the COM 
Browser both caused by the same type library registry 
entry.  This entry was of the type REG_EXPAND_SZ 
instead of the usual REG_SZ.

When running the COM Browser and expanding the 
registered type libraries, I woud get the following 
exception:
    File "win32com\client\combrowse.py", line 498, in 
GetSubList
    name = win32api.RegQueryValue(subKey, versionStr)
pywintypes.error: (13, 'RegQueryValue', 'The data is 
invalid.')
win32ui: Exception in OnNotify() handler


When running Makepy, I got the following:
  File "win32com\client\selecttlb.py", line 122, in 
EnumTlbs
    spec.ver_desc = tlbdesc + " (" + version + ")"
TypeError: unsupported operand types for +: 'NoneType' 
and 'str'


In both cases I traced the source of the error to a call 
to win32api.RegQueryValue().  From what I can tell, this 
function does not handle the REG_EXPAND_SZ type.  
The documentation for this function, that I found on 
ActiveState, says that this function should be avoided, 
and win32api.RegQueryValueEx() should be used instead.

So, in combrowse.py I replaced
   name = win32api.RegQueryValue(subKey, versionStr)
with:
   subSubKey = win32api.RegOpenKey(subKey, 
versionStr)
   name = win32api.RegQueryValueEx(subSubKey, '')[0]

And in selecttlp.py, EnumKeys() I replaced
   val = win32api.RegQueryValue(root, item)
to:		
   subKey = win32api.RegOpenKey(root, item)
   val = win32api.RegQueryValueEx(subKey, '')[0]

This seems to work, but I am completely new to this 
API, so I make no guarantees.

It looks like there are many other places that use 
RegQueryValue(), so they may need to be changed 
aswell.


I am running Python 2.2.3, with win32all build 162, on 
windows XP.  The registry entry that caused the 
problem was for the LDMView ActiveX Control module.

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