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  • Blog Post: Help! How do I send extensible data in my WS-Eventing Subscribe?

    Reader Nitin raises a good question: how does an app put extensible data into the Subscribe message that's used to set up events? Example scenario: WSD Scan Nitin's question asks specifically about the WSD Scan protocol built into Vista and Servier 2008, so I'll use that as an example. The scan protocol...
  • Blog Post: More on attachments

    Since my monologue on the IWSDAttachment object last week, it's occured to me that there's a much simpler way to explain which programming patterns you have to use when reading from or writing to WSDAPI attachments. Here's a table that describes it. To use this table, you need to determine whether...
  • Blog Post: Help! I can't write to my attachments!

    Another day, and another detour from WSDAPI 101 . Today's article comes courtesy of WSDAPI's attachment interfaces, which are often the subject of questions I receive from fellow developers. In specific, I'm talking about: IWSDOutboundAttachment :: Write , and to a much lesser extent, IWSDInboundAttachment...
  • Blog Post: Help! WSDAPI crashes after my service method returns!

    I'm going to take a quick detour from WSDAPI 101 to comment on an issue you may have seen when developing and testing a service or client based on WSDAPI. The symptoms of this crash This problem may arise in two scenarios: You have a service object hosted by the WSDAPI device host. A wire message...
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