Timer Driver Registry Settings (Windows CE 5.0)
The priority that the application can assign to TimerThread varies depending on whether an application is trusted or untrusted. Trusted applications have access to more thread priorities. Untrusted applications have access only to a specified range of priorities. For more information on priority levels, see Real-Time Priority System Levels.
Trusted applications use CeSetThreadPriority to set thread priorities and untrusted applications use SetThreadPriority. For more information about creating a trusted environment, see Trusted Environment Creation.
You can control the thread priority of TimerThread by using the registry key under HKEY_LOCAL_MACHINE\SYSTEM\MMTIMER\Priority256. By default, Priority256 is set to THREAD_PRIORITY_TIME_CRITICAL.
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