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Editorial Team
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Asked: 2026-06-15T12:32:56+00:00

Access 2010-application using TreeView (MSComctlLib.TreeCtrl.2) shows and populates as expected but suddenly after windows

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Access 2010-application using TreeView (MSComctlLib.TreeCtrl.2) shows and populates as expected but suddenly after windows security patches doesn’t fire events back to VBA.

Tried with rolling back MSCOMCTL.OCX in /syswow64, but no luck.

Please ping any similar behaviour or hints for fixing the issue.

regards,

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1 Answer

  1. Editorial Team

    The problem appears to be that the registry entries for mscomctl.ocx are broken after the security update. One solution can be found in this KB article. It suggests to run this batch file as administrator:

    reg delete hkcr\typelib\{831FDD16-0C5C-11D2-A9FC-0000F8754DA1}\2.0 /f
if exist %systemroot%\SysWOW64\cscript.exe goto 64 
%systemroot%\system32\regsvr32 /u mscomctl.ocx
%systemroot%\system32\regsvr32 mscomctl.ocx
exit
:64 
%systemroot%\sysWOW64\regsvr32 /u mscomctl.ocx
%systemroot%\sysWOW64\regsvr32 mscomctl.ocx
exit

    I’ve verified that this works in our environment.

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