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Determines the size, in bytes, of an array of event notifications, and validates the memory associated with the array.
Client applications and service providers
If NULL is passed in the pcb parameter, the ScCountNotifications function only validates the array of notifications but no counting is done; if a non-null value is passed in pcb, ScCountNotifications determines the size of the array and stores the cause pcb. The pcb parameter must be large enough to contain the entire array.