Public Sub AcquireFast( _
   ByVal baseFileName As String, _
   ByVal flags As TwainFastUserInterfaceFlags, _
   ByVal transferMode As TwainTransferMode, _
   ByVal format As RasterImageFormat, _
   ByVal bitsPerPixel As Integer, _
   ByVal multiPage As Boolean, _
   ByVal bufferSize As Integer, _
   ByVal usePreferredBufferSize As Boolean _
) 

Dim instance As TwainSession
Dim baseFileName As String
Dim flags As TwainFastUserInterfaceFlags
Dim transferMode As TwainTransferMode
Dim format As RasterImageFormat
Dim bitsPerPixel As Integer
Dim multiPage As Boolean
Dim bufferSize As Integer
Dim usePreferredBufferSize As Boolean
 
instance.AcquireFast(baseFileName, flags, transferMode, format, bitsPerPixel, multiPage, bufferSize, usePreferredBufferSize)

public void AcquireFast( 
   string baseFileName,
   TwainFastUserInterfaceFlags flags,
   TwainTransferMode transferMode,
   RasterImageFormat format,
   int bitsPerPixel,
   bool multiPage,
   int bufferSize,
   bool usePreferredBufferSize
)

public:
void AcquireFast( 
   String^ baseFileName,
   TwainFastUserInterfaceFlags flags,
   TwainTransferMode transferMode,
   RasterImageFormat format,
   int bitsPerPixel,
   bool multiPage,
   int bufferSize,
   bool usePreferredBufferSize
) 

Public Sub twain_AcquireMulti(ByVal sender As Object, ByVal e As TwainAcquireMultiPageEventArgs)
      Dim msg As String
      If e.FinishScan Then
         msg = String.Format("The page # {0} is scanned and saved to file name {1}", e.PageNumber, e.FileName)
         MessageBox.Show(msg)
      End If

      e.Cancel = False
   End Sub


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

      session.EnableAcquireMultiPageEvent = True
      AddHandler session.AcquireMultiPage, AddressOf twain_AcquireMulti

      session.AcquireFast(Path.Combine(LEAD_VARS.ImagesDir, "test.tif"), TwainFastUserInterfaceFlags.Show, TwainTransferMode.Buffer, RasterImageFormat.Tif, 1, True, 0, True)
      session.Shutdown()
   End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

public void twain_AcquireMulti(object sender, TwainAcquireMultiPageEventArgs e)
   {
      string msg;
      if (e.FinishScan)
      {
         msg = String.Format("The page # {0} is scanned and saved to file name {1}", e.PageNumber, e.FileName);
         MessageBox.Show(msg);
      }

      e.Cancel = false;
   }


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

      session.EnableAcquireMultiPageEvent = true;
      session.AcquireMultiPage += new  EventHandler<TwainAcquireMultiPageEventArgs>(twain_AcquireMulti);

      session.AcquireFast(Path.Combine(LEAD_VARS.ImagesDir, "Out_test.tif"),
                          TwainFastUserInterfaceFlags.Show,
                          TwainTransferMode.Buffer,
                          RasterImageFormat.Tif, 1, true, 0, true);
      session.Shutdown();
   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}