Database access helper method.
Reads annotations from the database into a DataPointAnnotation array. At least one data point before and after the time range must be included in the returned array. The returned data has to be sorted for increasing timestamps. On error throw a HDAException with the error code that is to be rturned to the client.

'Usage
 
Dim instance As DBAPlugin
Dim item As ItemInfo
Dim startTime As Date
Dim endTime As Date
Dim value() As DataPointAnnotation
 
value = instance.GetAnnotations(item, startTime, endTime)

public DataPointAnnotation[] GetAnnotations( 
   ItemInfo item,
   DateTime startTime,
   DateTime endTime
)