## Virtual Device Driver Reference for OS/2

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### VDHArmTimerHook - Purpose

Context Issues: This function can be called in the initialization, task, or interrupt context.

DOS Session Terminations: Any timer hooks allocated in the context of the terminating DOS session are deallocated automatically by the DOS Session Manager at DOS session termination.

Notes: If type VDH_TIMER_INTERRUPT_HOOK, the timer handler cannot block since it executes at physical interrupt time.