This article was previously published under Q234538
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Calls to the WINTRUST APIs may not work if an older encryption software development kit (SDK) was used to create these calls. These calls usually do not work because of differences in supported structure sizes between the two versions.
This problem occurs because the encryption support file (Softpub.dll) that is included in Windows NT 4.0 Service Pack 4 is not backwards compatible with the encryption APIs with regard to structure size.
To resolve this problem, obtain the latest service pack for Windows NT 4.0. 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
The latest service pack is also available at the following Internet location: