/// <summary>
/// Synchronously acquire images from Kodak scanner and uses Kodak dual stream feature.
/// </summary>
public void SynchronouslyAcquireImagesFromKodakScannerAndUseDualStreamFeature()
{
    try
    {
        using (Vintasoft.Twain.DeviceManager deviceManager = new Vintasoft.Twain.DeviceManager())
        {
            // open the device manager
            deviceManager.Open();

            // get reference to the default device
            Vintasoft.Twain.Device device = deviceManager.DefaultDevice;

            // set scanning settings
            device.TransferMode = Vintasoft.Twain.TransferMode.Memory;
            device.ShowUI = false;

            // open the 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();

            // synchronously acquire image(s) from TWAIN device
            Vintasoft.Twain.AcquireModalState acquireModalState;
            do
            {
                acquireModalState = device.AcquireModal();
                switch (acquireModalState)
                {
                    case Vintasoft.Twain.AcquireModalState.ImageAcquired:
                        // get info about acquired image
                        Vintasoft.Twain.ImageInfo acquiredImageInfo = device.AcquiredImage.ImageInfo;
                        // show message box with info about acquired image
                        System.Console.WriteLine(string.Format("{0} {1}", acquiredImageInfo.PixelType, acquiredImageInfo.Resolution));

                        // dispose the acquired image
                        device.AcquiredImage.Dispose();
                        break;

                    case Vintasoft.Twain.AcquireModalState.ScanCompleted:
                        // output current state
                        System.Console.WriteLine("Scan completed.");
                        break;

                    case Vintasoft.Twain.AcquireModalState.ScanCanceled:
                        // output current state
                        System.Console.WriteLine("Scan canceled.");
                        break;

                    case Vintasoft.Twain.AcquireModalState.ScanFailed:
                        // output current state
                        System.Console.WriteLine(string.Format("Scan failed: {0}", device.ErrorString));
                        break;
                }
            }
            while (acquireModalState != Vintasoft.Twain.AcquireModalState.None);

            // close the device
            device.Close();

            // close the device manager
            deviceManager.Close();
        }
    }
    catch (Vintasoft.Twain.TwainException ex)
    {
        System.Console.WriteLine("Error: " + ex.Message);
    }

    System.Console.ReadLine();
}

''' <summary>
''' Synchronously acquire images from Kodak scanner and uses Kodak dual stream feature.
''' </summary>
Public Sub SynchronouslyAcquireImagesFromKodakScannerAndUseDualStreamFeature()
    Try
        Using deviceManager As New Vintasoft.Twain.DeviceManager()
            ' open the device manager
            deviceManager.Open()

            ' get reference to the default device
            Dim device As Vintasoft.Twain.Device = deviceManager.DefaultDevice

            ' set scanning settings
            device.TransferMode = Vintasoft.Twain.TransferMode.Memory
            device.ShowUI = False

            ' open the 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()

            ' synchronously acquire image(s) from TWAIN device
            Dim acquireModalState As Vintasoft.Twain.AcquireModalState
            Do
                acquireModalState = device.AcquireModal()
                Select Case acquireModalState
                    Case Vintasoft.Twain.AcquireModalState.ImageAcquired
                        ' get info about acquired image
                        Dim acquiredImageInfo As Vintasoft.Twain.ImageInfo = device.AcquiredImage.ImageInfo
                        ' show message box with info about acquired image
                        System.Console.WriteLine(String.Format("{0} {1}", acquiredImageInfo.PixelType, acquiredImageInfo.Resolution))

                        ' dispose the acquired image
                        device.AcquiredImage.Dispose()
                        Exit Select

                    Case Vintasoft.Twain.AcquireModalState.ScanCompleted
                        ' output current state
                        System.Console.WriteLine("Scan completed.")
                        Exit Select

                    Case Vintasoft.Twain.AcquireModalState.ScanCanceled
                        ' output current state
                        System.Console.WriteLine("Scan canceled.")
                        Exit Select

                    Case Vintasoft.Twain.AcquireModalState.ScanFailed
                        ' output current state
                        System.Console.WriteLine(String.Format("Scan failed: {0}", device.ErrorString))
                        Exit Select
                End Select
            Loop While acquireModalState <> Vintasoft.Twain.AcquireModalState.None

            ' close the device
            device.Close()

            ' close the device manager
            deviceManager.Close()
        End Using
    Catch ex As Vintasoft.Twain.TwainException
        System.Console.WriteLine("Error: " + ex.Message)
    End Try

    System.Console.ReadLine()
End Sub