'Usage
 
Dim instance As AppPlugin
Dim startTime As Date
Dim endTime As Date
Dim numValues As Integer
Dim bounds As Boolean
Dim serverHandles() As Integer
Dim itemValues As OPCHDAItem()
Dim errors As Integer()
Dim value As Integer
 
value = instance.ReadRaw(startTime, endTime, numValues, bounds, serverHandles, itemValues, errors)

public int ReadRaw( 
   DateTime startTime,
   DateTime endTime,
   int numValues,
   bool bounds,
   int[] serverHandles,
   out OPCHDAItem[] itemValues,
   out int[] errors
)

Parameters

startTime

The beginning of the history period to be read.

endTime

The end of the history period to be read.

numValues

The maximum number of values returned for any item over the time range. If only one time is specified, the time range must extend to return this number of values.

bounds

True if bounding values should be returned.

serverHandles

The list of server item handles for the items to be read.

itemValues

Array of objects in which the item values are returned. The order of the objects in the array shall be the same as the order of the server item handles.

errors

Array of HRESULTs indicating the success of the individual item reads. The errors correspond to the handles passed in phServer. This indicates whether the read succeeded in obtaining a defined value, quality and timestamp. NOTE that any FAILED error code indicates that the corresponding OPCHDA_ITEM struct is undefined.

Return Value

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

AppPlugin Class
AppPlugin Members
Overload List