Microsoft KB Archive/174511

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Access Violation in Win32K When Calling GetDCEx

Article ID: 174511

Article Last Modified on 11/1/2006


  • Microsoft Windows NT Workstation 4.0 Developer Edition
  • Microsoft Windows NT Server 4.0 Standard Edition

This article was previously published under Q174511


In certain instances under Windows NT 4.0, application code may fail with an access violation in Win32k.sys when using the following API:

   GetDCEx(GetDesktopWindow(), NULL, DCX_PARENTCLIP);


To resolve this problem, obtain the hotfix below, or wait for the next service pack.


Microsoft has confirmed this to be a problem in Windows NT version 4.0. A supported fix is now available, but has not been fully regression tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information.

Keywords: kbhotfixserver kbqfe kbbug kbfix kbprint KB174511