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

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

                ' open the device
                device.Open()

                ' get reference to object that manipulates IPixelType capability
                Dim pixelTypeCap As Vintasoft.Twain.DeviceCapability = device.Capabilities.Find(Vintasoft.Twain.DeviceCapabilityId.IPixelType)
                ' if IPixelType capability supported
                If pixelTypeCap IsNot Nothing Then
                        ' get information about current, default and supported values of capability
                        Dim capValue As Vintasoft.Twain.TwainValueContainerBase = pixelTypeCap.GetValue()

                        Select Case capValue.ContainerType
                                Case Vintasoft.Twain.TwainValueContainerType.[Enum]
                                        Dim capValueAsEnum As Vintasoft.Twain.TwainEnumValueContainer = DirectCast(capValue, Vintasoft.Twain.TwainEnumValueContainer)
                                        Dim enumValues As System.Array = capValueAsEnum.EnumValues

                                        ' output the capability values in human readable format
                                        System.Console.WriteLine(String.Format("Current pixel type: {0}", enumValues.GetValue(capValueAsEnum.ValueIndex)))
                                        System.Console.WriteLine(String.Format("Default pixel type: {0}", enumValues.GetValue(capValueAsEnum.DefaultValueIndex)))
                                        System.Console.Write("Supported pixel types:")
                                        For i As Integer = 0 To enumValues.Length - 1
                                                System.Console.Write(String.Format(" {0}", enumValues.GetValue(i)))
                                        Next
                                        Exit Select
                        End Select

                        System.Console.WriteLine()
                End If

                ' close the device
                device.Close()

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

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

        // get reference to the deafult device
        Vintasoft.Twain.Device device = deviceManager.DefaultDevice;
        
        // open the device
        device.Open();

        // get reference to object that manipulates IPixelType capability
        Vintasoft.Twain.DeviceCapability pixelTypeCap = device.Capabilities.Find(Vintasoft.Twain.DeviceCapabilityId.IPixelType);
        // if IPixelType capability supported
        if (pixelTypeCap != null)
        {
            // get information about current, default and supported values of capability
            Vintasoft.Twain.TwainValueContainerBase capValue = pixelTypeCap.GetValue();

            switch (capValue.ContainerType)
            {
                case Vintasoft.Twain.TwainValueContainerType.Enum:
                    Vintasoft.Twain.TwainEnumValueContainer capValueAsEnum = (Vintasoft.Twain.TwainEnumValueContainer)capValue;
                    System.Array enumValues = capValueAsEnum.EnumValues;

                    // output the capability values in human readable format
                    System.Console.WriteLine(string.Format("Current pixel type: {0}", enumValues.GetValue(capValueAsEnum.ValueIndex)));
                    System.Console.WriteLine(string.Format("Default pixel type: {0}", enumValues.GetValue(capValueAsEnum.DefaultValueIndex)));
                    System.Console.Write("Supported pixel types:");
                    for (int i = 0; i < enumValues.Length; i++)
                        System.Console.Write(string.Format(" {0}", enumValues.GetValue(i)));
                    break;
            }

            System.Console.WriteLine();
        }

        // close the device
        device.Close();

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