Access Violation in Explorer when Viewing *.ht file Properties
Article ID: 168050
Article Last Modified on 11/1/2006
APPLIES TO
- Microsoft Windows NT Workstation 4.0 Developer Edition
- Microsoft Windows NT Server 4.0 Standard Edition
This article was previously published under Q168050
SYMPTOMS
If you have a debugger running and you open the property page for a
hyperterminal session file (*.ht), and then close the property page, you
will receive an access violation in Explorer.exe.
NOTE: *.ht files can be found in
%winnt%\Profiles\<username>\Start Menu\Programs\Accessories\Hyperterminal.
CAUSE
HyperTerminal calls RegOpenKey to duplicate a handle to a registry item.
But RegOpenKey does not duplicate the handle, it just returns the one you
gave it (for example, the Shell's handle). Later, the HyperTerminal .dll
closes this handle, and then the shell attempts to close the handle that
was already closed by HyperTerminal.
RESOLUTION
HyperTerminal now uses RegOpenKeyEx, which does give back a new handle to
the same item (in other words, duplicates it correctly), instead of
RegOpenKey.
STATUS
Microsoft has confirmed this to be a problem in Windows NT version 4.0.
This problem was corrected in the latest Microsoft Windows NT 4.0 U.S. Service
Pack. For information on obtaining the service pack, query on the following word
in the Microsoft Knowledge Base (without the spaces):
Additional query words: prodnt dr watson
Keywords: kbbug kbfix kbinterop KB168050