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Libraries

From: Windows Phone SDK Essential Training

Video: Libraries

One of the big features added to Windows Phone 8 is the ability to include native code. There's two kinds of native code you can include. You can include a native DLL, for example, like SQLite. Or you can include a Windows Phone Runtime component. In order to be able to access a native DLL from a managed app, you have to use a Windows Phone Runtime component to get to the DLL. If you're building a C++ main app that uses DirectX3D, you can use your native DLLs directly just as you would in any other C++ environment.

Libraries

One of the big features added to Windows Phone 8 is the ability to include native code. There's two kinds of native code you can include. You can include a native DLL, for example, like SQLite. Or you can include a Windows Phone Runtime component. In order to be able to access a native DLL from a managed app, you have to use a Windows Phone Runtime component to get to the DLL. If you're building a C++ main app that uses DirectX3D, you can use your native DLLs directly just as you would in any other C++ environment.

When you include a native DLL, you have to compile it for both x86 and ARM CPU architectures. That's because there are two different kinds of CPUs out there in the world running Windows Phone 8. When you build a Windows Phone runtime component, it can automatically be compiled to what's called Any CPU. Which is subsequently natively compiled by the Windows Phone store infrastructure into the appropriate x86 or ARM architecture that matches the user's device.

When you build a Windows Phone runtime component, you can use the async and await keywords and access WinRT and APIs. You can also use manage compatible data formats such as String. So let's go take a look, and we'll build a simple managed app. We'll add a simple Windows phone runtime component, and be able to instantiate the C++ from our C# code. And then, in the next video, we'll go back and retool our Hello World app to include a call to a C++ module, inside the process of hello world.

So, let's switch over to Visual Studio. Here in Visual Studio, with do file new project, and we'll come up to the visual C++, we'll come down here to windows phone. And just select plain old Windows phone app. And we'll call this one ManagedPlusNative. Click on OK. Now, this is a standard Windows Phone 8 empty shell. But what we want to do now is show the process you need to do to add a Windows Phone runtime component in C++ and hook the two of them together. You go to the Solution, you right-click, you come down to the Add Sub-Menu Item, and select New Project.

We'll come down here to Other Languages, Visual C++, scroll down, select Windows Phone. And one of the templates we have available to us is Windows Phone Runtime Component. So, we click on OK, and we now have a C++ Windows Phone Runtime Component. And you notice that we have one public member which is the constructor. You might think, I can come back to my main page, open up my C++ file, come up here and say using Windows. And, wait a minute, I don't get Intellisense help for Windows Phone Runtime Component 1, so let's erase that.

And there's two reasons for that. The first reason is I need to add a project reference. So I'll come over to our Manage Plus Native Project, right-click, select Add Reference, come to Solution, select our Windows Phone Runtime Component project, and click OK. And now, I also have to come to the solution and select rebuild. Because Visual Studio doesn't know about the members in the methods inside the native library until its been build at least once. And each time, you change it in the sense of adding additional members or methods you have to rebuild before they're visible to Intellisense.

So, now I can come to my C# code and say, using Windows, and there's our Windows Phone runtime component 1, namespace. And, now I can come down into my code and say Windows Phone Runtime Component because that's my class name, WRC equals New Windows Phone Runtime Component. And now if I build this, this builds successfully. So, here we've instantiated an instance of the WindowsPhoneRuntimeComponent in C++, and we could call methods on it from our C# code.

In our next video, we'll start with our existing Hello World application and add some C++ code to it.

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This video is part of

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Windows Phone SDK Essential Training

65 video lessons · 2904 viewers

Michael Lehman
Author

 
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  1. 2m 34s
    1. Welcome
      55s
    2. What you need to know to take this course
      51s
    3. Using the exercise files
      48s
  2. 15m 44s
    1. Downloading and installing the Windows Phone tools
      2m 44s
    2. Creating a Hello World application
      9m 31s
    3. Debugging on a Windows Phone device
      3m 29s
  3. 6m 29s
    1. Exploring device capabilities
      2m 58s
    2. Understanding the Emulator
      3m 31s
  4. 8m 51s
    1. Understanding the SDK
      8m 51s
  5. 41m 32s
    1. Introducing the converter
      3m 36s
    2. Creating the user experience (UX)
      13m 35s
    3. Responding to the Application Bar
      2m 40s
    4. Implementing click handlers
      3m 52s
    5. Saving and loading settings
      8m 18s
    6. Preparing your app for shipment
      9m 31s
  6. 20m 48s
    1. Introducing sonnets
      1m 38s
    2. Data binding with Silverlight
      4m 4s
    3. Exploring the Model-View-ViewModel pattern (MVVM)
      4m 2s
    4. Implementing the Master-Detail pattern using pages
      3m 53s
    5. Loading external data
      7m 11s
  7. 50m 26s
    1. Choosing a multipage controller
      3m 13s
    2. Preparing for persistence
      7m 30s
    3. Updating the data model
      7m 2s
    4. Creating the details page
      4m 30s
    5. Bringing it all together
      3m 58s
    6. Cloning a Windows Phone app
      6m 49s
    7. Using SQL CE
      8m 49s
    8. Updating the data model
      2m 24s
    9. Querying and updating the database
      6m 11s
  8. 14m 19s
    1. Working with the camera
      6m 11s
    2. Exploring GPS
      5m 21s
    3. Exploring the accelerometer
      2m 47s
  9. 29m 34s
    1. Introducing recording and playback with XNA
      45s
    2. Capturing sound
      5m 12s
    3. Providing feedback while recording
      5m 50s
    4. Playing a recording
      4m 34s
    5. Persisting a recording
      2m 58s
    6. Listing recordings
      5m 15s
    7. Managing the recording list
      3m 26s
    8. Recording under the lock screen
      1m 34s
  10. 28m 32s
    1. Building the UX
      3m 54s
    2. Using WebClient
      4m 1s
    3. Determining network connectivity
      2m 9s
    4. Leveraging Internet Explorer
      7m 56s
    5. Adding a live tile
      2m 42s
    6. Building a background agent
      7m 50s
  11. 14m 46s
    1. Hello World in C++
      4m 35s
    2. Libraries
      4m 17s
    3. Managed plus managed
      5m 54s
  12. 26m 35s
    1. Exploring built-in controls
      4m 28s
    2. Windows Phone Toolkit
      2m 42s
    3. Introducing Coding4Fun
      3m 13s
    4. Reminders and notifications
      6m 10s
    5. Wallet and In-App Purchase
      1m 34s
    6. File and protocol associations
      1m 59s
    7. Bluetooth
      44s
    8. Integrating speech
      1m 28s
    9. Near field communication (NFC)
      1m 23s
    10. WinRT and legacy Windows Phone APIs
      2m 54s
  13. 12m 14s
    1. Publishing your apps
      2m 49s
    2. Learning from apps in the Windows Phone Marketplace
      1m 22s
    3. Staying in touch with updates and new information from Microsoft
      2m 34s
    4. Looking at Windows Phone 7 app reviews
      44s
    5. Exploring web sites books and other useful links
      4m 45s
  14. 1m 34s
    1. Farewell
      1m 34s

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