'Declaration
 
Overloads Function BeginRead( _
   ByVal count As Integer, _
   ByVal callback As VisaAsyncCallback, _
   ByVal state As Object _
) As IVisaAsyncResult

'Usage
 
Dim instance As IMessageBasedRawIO
Dim count As Integer
Dim callback As VisaAsyncCallback
Dim state As Object
Dim value As IVisaAsyncResult
 
value = instance.BeginRead(count, callback, state)

IVisaAsyncResult BeginRead( 
   int count,
   VisaAsyncCallback callback,
   object state
)

IVisaAsyncResult^ BeginRead( 
   int count,
   VisaAsyncCallback^ callback,
   Object^ state
) 

Parameters

count

The maximum number of bytes to read.

callback

The method to call when the operation is complete.

state

Information about the state of this particular asynchronous operation that is attached to the Async Results.

A reference to an object that contains arbitrary information of interest to the calling program, and related to the asynchronous operation. This allows the asynchronous operation to provide the reference back to the calling program (as context) when the operation is complete. This is particularly useful when callbacks are used. Note that the object is not used by the asynchronous operation.

Return Value

Current with Keysight IO Libraries Suite 18