Visual Basic (Usage)	Copy Code
Dim instance As OpcXmlDA Dim Options As RequestOptions Dim ItemList As WriteRequestItemList Dim ReturnValuesOnReply As Boolean Dim callback As AsyncCallback Dim asyncState As Object Dim value As IAsyncResult   value = instance.BeginWrite(Options, ItemList, ReturnValuesOnReply, callback, asyncState)

public IAsyncResult BeginWrite( 
   RequestOptions Options,
   WriteRequestItemList ItemList,
   bool ReturnValuesOnReply,
   AsyncCallback callback,
   object asyncState
)

Parameters

Options

Container with options used in most server calls.

ItemList

The container for the individual Items. It is expected that there are one or more Items per ItemList.

ReturnValuesOnReply

Indicates whether to return the Value for each item (i.e., the Value of the ItemValue structure). The returned value is the value “accepted” by the server, or device. If a Value is returned, then the associated QualityField will also be returned, and as appropriate the LimitField, and VendorField. The returned value is equivalent to the value which would be returned by the server to the client if the client had performed a read request directly after the write request. Values are never returned if the Write fails. If an item is write-only the server will return E_WRITEONLY in the response for this item. The response will provide no value element for the affected item.

callback

Delegate of the method to be called when the asynchronous operation is completed.

asyncState

A user-provided object that distinguishes this particular asynchronous request from other requests.

Return Value

Target Platforms:Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows 7, Windows Server 2008 family

Reference