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Windows® Phone 8 Unleashed by Daniel Vaughan

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Scheduled Task API Limitations

Scheduled task agents do not have access to the entire set of APIs that foreground apps do. There is a set of APIs that are off-limits, and using an API from the set either raises an UnauthorizedAccessException at runtime or causes the app to fail certification during submission to the Windows Phone Marketplace. For the list of unsupported APIs, see Table 32.3.

TABLE 32.3. Scheduled Task Agent Unsupported APIs

Image

One noteworthy limitation is the inability to display visual elements from a background agent. You see a workaround in the next section.

Providing Feedback to the User from an Agent

On occasion, your background ...

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