Public Function GetItem( _
   ByVal index As Integer, _
   ByVal barcodeTextIndex As Integer _
) As Object

Dim instance As TwainInformation
Dim index As Integer
Dim barcodeTextIndex As Integer
Dim value As Object
 
value = instance.GetItem(index, barcodeTextIndex)

public object GetItem( 
   int index,
   int barcodeTextIndex
)

public:
Object^ GetItem( 
   int index,
   int barcodeTextIndex
) 

Public Sub GetItemExample(ByVal parent As IWin32Window)
   Try
      Dim session As TwainSession = New TwainSession()
      session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None)

      Dim twainExtImageInfo As TwainExtraImageInformation = New TwainExtraImageInformation(1)

      twainExtImageInfo.GetInformation(0).InfoId = TwainExtendedImage.BarcodeText
      twainExtImageInfo.GetInformation(0).ItemType = TwainItemType.Uint32

      session.UpdateExtraImageInformation(twainExtImageInfo)

      If twainExtImageInfo.GetInformation(0).ReturnCode = TwainReturnCode.Success Then
         Dim i As Integer = 0
         Do While i < twainExtImageInfo.GetInformation(0).Count
            Dim item As UInteger = CUInt(twainExtImageInfo.GetInformation(0).GetItem(i, 0))
            'Do more processing on the item value
            i += 1
         Loop
      End If

      session.Shutdown()
   Catch ex As Exception
      MessageBox.Show(ex.Message)
   End Try
End Sub

public void GetItemExample(IWin32Window parent)
{
   try
   {
      TwainSession session = new TwainSession();
      session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None);

      TwainExtraImageInformation twainExtImageInfo = new TwainExtraImageInformation(1);

      twainExtImageInfo.GetInformation(0).InfoId = TwainExtendedImage.BarcodeText;
      twainExtImageInfo.GetInformation(0).ItemType = TwainItemType.Uint32;

      session.UpdateExtraImageInformation(twainExtImageInfo);

      if (twainExtImageInfo.GetInformation(0).ReturnCode == TwainReturnCode.Success)
      {
         for (int i=0; i < twainExtImageInfo.GetInformation(0).Count; i++)
         {
            uint item = (uint)twainExtImageInfo.GetInformation(0).GetItem(i, 0);
            //Do more processing on the item value
         }
      }

      session.Shutdown();
   }
   catch (Exception ex)
   {
      MessageBox.Show(ex.Message);
   }
}