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MS Treeview from ASP issue after IE ActiveX update (kb912945)
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Hi there,

I have an ASP page using the treeview control from mscomctl.ocx that
was running just fine. We updated our browsers with this package (
details at so I get
"Unhandled exception at 0x275888cf in IEXPLORE.EXE: 0xC0000005: Access
violation writing location 0x0000000b."

The other mscomctl.ocx's controls (ListView, MonthView, ImageList...)
are still working fine.

that's the code:
<OBJECT id=tvwPasta
classid="clsid:C74190B6-8589-11D1-B16A-00C0F0283628" width="100%"

<PARAM NAME="_ExtentX" VALUE="7303">
<PARAM NAME="_ExtentY" VALUE="6138">
<PARAM NAME="_Version" VALUE="393217">
<PARAM NAME="HideSelection" VALUE="1">
<PARAM NAME="Indentation" VALUE="700">
<PARAM NAME="LabelEdit" VALUE="1">
<PARAM NAME="LineStyle" VALUE="1">
<PARAM NAME="PathSeparator" VALUE="">
<PARAM NAME="Sorted" VALUE="0">
<PARAM NAME="Style" VALUE="7">
<PARAM NAME="ImageList" VALUE="">
<PARAM NAME="BorderStyle" VALUE="0">
<PARAM NAME="Appearance" VALUE="1">
<PARAM NAME="MousePointer" VALUE="0">
<PARAM NAME="Enabled" VALUE="1">

Any idea? Thanks in advance for any help.


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Posts: n/a

I had a similar problem and was advised to clear my cache, history etc and
restore IE to defaults. This fixed it after restarting. XP.

I think the actual problem is if you have Disable Script Debugging unchecked
in your Advanced settings. The download page
(;en-us;912945) has a
section which says

"External script technique does not work when the "Disable Script Debugging
(Internet Explorer)" check box is cleared"

but does not make clear that it will crash IE.



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Posts: n/a
Hi Sonny,

I had the same problem. I try to clear cache, history and so on, but IE
crash continuosly. I try uninstall the KB912945 (Control Panels -->
Add/Remove Installed Programs (check the "Show Updates")) and problem solved.

But I don't know, how I fix this problem on the customes computers ... (.


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Posts: n/a
Had the same issue when I installed KB912945. MSCOMCTL.OCX failed.
Uninstalled and it worked. Here is the work around I put in place to solve
the issue with KB912945 installed:

I but the Treeview in a <div id="div1" style="DISPLAY: none">, then set the
div to block, div1.Style.Display="block", in the Window_OnLoad() event. This
solves the IE Crash.

Also, I had to write a script to activate the controls on load. So I added
this just before the </BODY> tag:

<!-- Fix for IE Patch 912945 -->
<script language="JavaScript" src="ActivateActiveXControls.js"></script>

And here are the contents of the script:

function fnRewriteElements(strTagName)
var elements = document.getElementsByTagName(strTagName);
for (var i = 0; i < elements.length; i++)
elements[i].outerHTML = elements[i].outerHTML;

function fnActivateControls()

// Some pages may require a pause before this script
// is executed. This is required if the controls take
// longer to load then the page. If that is the case
// use the following method to create a pause before
// the script is executed.
//window.setTimeout("fnActivateControls()", 50);

// Comment this out if you are using the setTimeout() method.

Works like a champ now.
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