"Access Violation" Error Message with Program that Uses the DdeAddData() Function

This article was previously published under Q239789
This article has been archived. It is offered "as is" and will no longer be updated.
Symptoms
When you run a program that uses the DdeAddData() function on a computer running Windows NT 4.0, you may receive an "Access Violation" error message.
Cause
This behavior can occur if one of the first two parameters passed to the DdeAddData() function is invalid (for example, null). The program attempts to use the invalid handle value because it does not detect that the handle value returned by the DdeAddData() function is invalid.
Resolution

Windows NT Server or Workstation 4.0

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:
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:

Windows NT Server 4.0, Terminal Server Edition

To resolve this problem, obtain the latest service pack for Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack

Status
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition.

This problem was first corrected in Windows NT Server 4.0 Service Pack 6 and Windows NT Server 4.0, Terminal Server Edition Service Pack 6.
More information
For additional information about the DdeAddData() function, please visit the following Microsoft Web site:
Win32 code
Properties

Article ID: 239789 - Last Review: 11/02/2013 21:59:00 - Revision: 3.0

  • Microsoft Windows NT Workstation 4.0 Developer Edition
  • Microsoft Windows NT Server 4.0 Standard Edition
  • Microsoft Windows NT Server 4.0 Enterprise Edition
  • kbnosurvey kbarchive kbbug kbfix kbprogramming KB239789
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