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DRM Files

Windows Mobile 6.5
4/8/2010

This code sample is named FileDRM. It demonstrates how to use the FDRM API Reference, which allow applications to use Digital Rights Management (DRM) protected content. The application displays DRM protected JPEG images.

File-Based Digital Rights Management

File-Based Digital Rights Management

To run the code sample
  1. Navigate to the solution file (*.sln), and double-click it. By default, the solution files are copied to the following folder:
    C:\Program Files\Windows Mobile 6.5.3 DTK\Samples\Common\CPP\Win32\FileDRM
    Microsoft Visual Studio launches and loads the solution.
  2. Build the solution (Ctrl+Shift+B).
  3. Deploy the solution (F5).

To use the application
  • Using your mobile device's phone, download at least one DRM protected JPEG image.

The basic rules for using DRM content
  1. Call FileDrmVerifyRights before attempting to open the content to ensure that you will be able to use the content.
  2. Use FileDrmCreateFile instead of CreateFile to open the content.
    In this code sample, the routine CImageView::OpenImageFile demonstrates steps 1 and 2.
  3. Once the content has been "used," call FileDrmCommitRights.
    In this code sample, the routine CImageView::Draw demonstrates step 3.
    RemarksCall FileDrmVerifyRights before attempting to open the content to ensure that you will be able to use the content.
    Use FileDrmCreateFile instead of CreateFile to open the content.
    In this code sample, the routine CImageView::OpenImageFile demonstrates steps 1 and 2Once the content has been "used," call FileDrmCommitRights.
    In this code sample, the routine CImageView::Draw demonstrates step 3.

To use this application, you must have a mobile device designed to work with DRM content.

FileDrmCommitRights is called only after the image has been successfully displayed. This is important for content where the number of times that the content can be used is restricted. This routine also demonstrates how to handle content that might have restrictions on how long it can be used.

The FDRM APIs also work with non-protected content.

SDK: Windows Mobile Professional SDK and Windows Mobile Standard SDK

Development Environment: Visual Studio 2005 or 2008.

ActiveSync: Version 4.5.

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