Public Delegate Sub OnBGGrpRead( _
   ByVal ex As BGException, _
   ByVal requestErrors() As Integer, _
   ByVal rslt() As OPCItemState, _
   ByVal tag As Object _
) 

public delegate void OnBGGrpRead( 
   BGException ex,
   int[] requestErrors,
   OPCItemState[] rslt,
   object tag
)

Parameters

ex

null (Nothing) except when an error occured in the handling of the request. On error the other paramters are invalid, except for the tag parameter.

requestErrors

Array with HRESULT success/error codes indicating if the server accepted the read request.

rslt

Read result for the items for which the server accepted the read request.

tag

null (Nothing) or an object passed from the request call. The application can pass an object with any kind of information from the request module to the completion handler.

Target Platforms: Windows 7/8/10, Windows Server 2003/2008/2012/2016, .NET 4.x

See Also