Opc data Access Automation Specification

4.5.4.4

 

AddItems 

Description 

Creates OPCItem objects and adds them to the collection. The properties of each new OPCItem 

are determined by the current defaults in the OPCItems collection object. After an OPCItem is 

added, its properties can also be modified. 

Syntax 

AddItems (Count As Long, ItemIDs() As String, ClientHandles() As Long, ByRef  

ServerHandles() As Long, ByRef Errors() As Long, Optional RequestedDataTypes As Variant, 

Optional AccessPaths As Variant) 

 

Part Description 

Count 

The number of items to be affected 

ItemIDs 

Array of Fully Qualified ItemID’s 

ClientHandles 

Array of client item handles for the items processed 

ServerHandles 

Array of server item handles for the items processed 

Errors 

Array of Long’s indicating the success of the individual items 

operation.  

RequestedDataTypes  Optional Variant containing an integer array of Requested 

DataTypes. 

AccessPaths 

Optional Variant containing a string array of Access Path’s. 

 

See Also 

Appendix A - OPC Automation Error Handling 

Appendix D- Notes On Automation Data Types 

Example 

Dim addItemCount as long 

Dim AnOPCItemIDs() as String 

Dim AnOPCItemServerHandles as long 

Dim AnOPCItemServerErrors as long 

Dim AnOPCRequestedDataTypes as variant 

Dim AnOPCAccessPathss as variant 

For  x = 1 To AddItemCount 

 

ClientHandles(x)  

= x + 1 

 

AnOPCItemID(x) = “Register_”  &  x 

Next x 

AnOPCItemCollection.AddItems AddItemCount, AnOPCItemIDs, ClientHandles,  

AnOPCItemServerHandles, AnOPCItemServerErrors, AnOPCRequestedDataTypes, 

67 

 

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OPC Data Access Automation Specification2.02 

AnOPCAccessPathss 

‘ add code to process any errors that are returned from ‘the method, individual errors are reported in 

the Errors array