Private Shared Sub AcquiredImagesWithDualStream()
    ' create the device manager
    Using deviceManager As New Vintasoft.Twain.DeviceManager()
        ' open the device manager
        deviceManager.Open()

        ' get reference to Kodak scanner
        Dim device As Vintasoft.Twain.Device = deviceManager.Devices.Find("KODAK Scanner: i1410/i1420/i1440")

        ' disable UI
        device.ShowUI = False

        ' open device
        device.Open()

        ' set inches as units of measure
        device.UnitOfMeasure = Vintasoft.Twain.UnitOfMeasure.Inches
        ' enable duplex
        device.DocumentFeeder.DuplexEnabled = True

        ' select color camera
        device.Cameras.SetSelectedCamera("/Camera_Color_Both")
        ' set resolution for color images
        device.Resolution = New Vintasoft.Twain.Resolution(300, 300)
        ' enable color camera
        device.Cameras.EnableSelectedCamera()

        ' select black-white camera
        device.Cameras.SetSelectedCamera("/Camera_Bitonal_Both")
        ' set resolution for black-white images
        device.Resolution = New Vintasoft.Twain.Resolution(200, 200)
        ' enable black-white camera
        device.Cameras.EnableSelectedCamera()


        ' modally acquire images from the scanner
        Dim acquireModalState As Vintasoft.Twain.AcquireModalState = Vintasoft.Twain.AcquireModalState.None
        Dim acquiredImageInfo As Vintasoft.Twain.ImageInfo
        Do
            ' acquire image from scanner
            acquireModalState = device.AcquireModal()

            ' write information about acquired image
            If acquireModalState = Vintasoft.Twain.AcquireModalState.ImageAcquired Then
                ' get info about acquired image
                acquiredImageInfo = device.AcquiredImage.ImageInfo
                ' output info about acquired image
                System.Console.WriteLine(acquiredImageInfo.PixelType.ToString() & " " & acquiredImageInfo.Resolution.ToString())

                ' dispose the acquired image
                device.AcquiredImage.Dispose()
            End If
        Loop While acquireModalState <> Vintasoft.Twain.AcquireModalState.None

        ' close the device
        device.Close()

        ' close TWAIN device manager
        deviceManager.Close()
    End Using
End Sub

private static void AcquiredImagesWithDualStream()
{
    // create the device manager
    using (Vintasoft.Twain.DeviceManager deviceManager = new Vintasoft.Twain.DeviceManager())
    {
        // open the device manager
        deviceManager.Open();

        // get reference to Kodak scanner
        Vintasoft.Twain.Device device = deviceManager.Devices.Find("KODAK Scanner: i1410/i1420/i1440");

        // disable UI
        device.ShowUI = false;

        // open device
        device.Open();

        // set inches as units of measure
        device.UnitOfMeasure = Vintasoft.Twain.UnitOfMeasure.Inches;
        // enable duplex
        device.DocumentFeeder.DuplexEnabled = true;

        // select color camera
        device.Cameras.SetSelectedCamera("/Camera_Color_Both");
        // set resolution for color images
        device.Resolution = new Vintasoft.Twain.Resolution(300, 300);
        // enable color camera
        device.Cameras.EnableSelectedCamera();

        // select black-white camera
        device.Cameras.SetSelectedCamera("/Camera_Bitonal_Both");
        // set resolution for black-white images
        device.Resolution = new Vintasoft.Twain.Resolution(200, 200);
        // enable black-white camera
        device.Cameras.EnableSelectedCamera();


        // modally acquire images from the scanner
        Vintasoft.Twain.AcquireModalState acquireModalState = Vintasoft.Twain.AcquireModalState.None;
        Vintasoft.Twain.ImageInfo acquiredImageInfo;
        do
        {
            // acquire image from scanner
            acquireModalState = device.AcquireModal();

            // write information about acquired image
            if (acquireModalState == Vintasoft.Twain.AcquireModalState.ImageAcquired)
            {
                // get info about acquired image
                acquiredImageInfo = device.AcquiredImage.ImageInfo;
                // output info about acquired image
                System.Console.WriteLine(acquiredImageInfo.PixelType.ToString() + " " + acquiredImageInfo.Resolution.ToString());

                // dispose the acquired image
                device.AcquiredImage.Dispose();
            }
        }
        while (acquireModalState != Vintasoft.Twain.AcquireModalState.None);

        // close the device
        device.Close();

        // close TWAIN device manager
        deviceManager.Close();
    }
}