December, 2006

  • dimeby8

    Connecting to a WPD device in C#

    • 2 Comments
    This is the C# equivalent of an earlier C++ post on connecting to a WPD device. We'll concentrate on the implementation here - you may refer back to that earlier post for further explanation. // Create our client information collection PortableDeviceApiLib...
  • dimeby8

    Marshalling variant properties in C#

    • 3 Comments
    This post is a continuation of the one covering WPD property retrieval in C# . That post explained how to marshal strings and the basic int properties. Handling other types such as VT_DATE and VT_BOOL is trickier so I'll try to cover them here. VT_DATE...
  • dimeby8

    WPD Content Enumeration in C#

    • 0 Comments
    WPD content enumeration in C# is pretty close to the C++ style. Here's a basic example that enumerates the object IDs of the objects present on the device. static void Enumerate( ref PortableDeviceApiLib.IPortableDeviceContent pContent, string parentID...
  • dimeby8

    Setting WPD properties in C#

    • 0 Comments
    Since setting a WPD property requires manipulating a PROPVARIANT structure through interop, we must make use of the marshalling rules we set in our last post . We'll take a look at a function that allows string properties to be set. static void SetStringValue...
  • dimeby8

    WPD property retrieval in C#

    • 9 Comments
    WPD property values are retrieved as PROPVARIANTs through the WPD API. Unfortunately there is no native support for PROPVARIANTs in C#. To correctly retrieve the property values (or anything that is in a PROPVARIANT) through the WPD API in C#, we must...
  • dimeby8

    Where are the WPD property keys in C#?

    • 4 Comments
    If you followed the exercise from our first C# post , you must have noticed that the PortableDeviceApi and PortableDeviceTypes typelibs don't expose the WPD property keys such as WPD_OBJECT_ID, WPD_OBJECT_FORMAT, etc. This can be a major blocker since...
  • dimeby8

    Flying Wiimotes

    • 1 Comments
    I just bought a Wii and it has totally changed my gamer attitude, and I wasn't even a gamer to start with. No more button mashing anymore - arm-swinging and flailing with some actual hand-eye coordination is what it's all about. Of course with all the...
  • dimeby8

    Enumerating WPD devices in C#

    • 18 Comments
    Let's take a look at how we can enumerate WPD devices in C#. This post assumes that you already have a project set up using these instructions . (Update: You will also need to follow the disassembly/reassembly instructions below for this to work correctly...
  • dimeby8

    C# and the WPD API

    • 3 Comments
    There currently is no managed/C# flavor of the WPD API. This, of course, doesn't mean that you are locked out from using the WPD API if you want to use C#. Since the API is a set of COM interfaces, we simply have to interop across from C#. Granted it...
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