Before the associated asynchronous operation has been completed by executing EndRead or EndWrite, the value of this property is undefined. After the associated asynchronous operation has been completed by executing EndRead or EndWrite, the value of this property is the actual number of bytes written (for a write operation) or the actual number of bytes read (for a read operation).

'Declaration
 
ReadOnly Property Count As Long

'Usage
 
Dim instance As IVisaAsyncResult
Dim value As Long
 
value = instance.Count

long Count {get;}

property int64 Count {
   int64 get();
}