Handle Leak Occurs When Using RasDial API

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Article ID: 197517 - View products that this article applies to.
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A handle leak may occur while using the RasDial API. After the connection is closed using RasHangUp, you may notice that the handle count of the application does not return to the value before the RasDial call. This is more noticeable on applications that continually make connections using RasDial and then close them using RasHangup.


RasDial opens a handle to the process token and does not close it, which causes the handle count to increase every time RasDial is called.


To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:
  • Windows Service Pack Center -or-

  • 152734 how to obtain the latest windows nt 4.0 service pack
For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:


Microsoft has confirmed this to be a problem in Windows NT version 4.0. This problem was first corrected in Windows NT version 4.0 Service Pack 5.


Article ID: 197517 - Last Review: November 2, 2013 - Revision: 3.0
Applies to
  • Microsoft Windows NT Workstation 4.0 Developer Edition
  • Microsoft Windows NT Server 4.0 Standard Edition
kbnosurvey kbarchive kbhotfixserver kbqfe kbbug kbfix KB197517

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