This article was previously published under Q239789
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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.
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.
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:
152734how 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:
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
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.
For additional information about the DdeAddData() function, please visit the following Microsoft Web site: