Take the following steps to create and run a program that shows how to work with pages in an OCR document. Remember, the purpose of the tutorials is to provide you with a quick and easy way to generate an OCR program:

1. Start Visual Studio 2005 or 2008

2. Choose File->New->Project from the menu

3. In the New Project dialog box, choose either "Visual C# Projects" or "Visual Basic Projects" in the Projects Type List, and choose "Windows Application" in Visual Studio 2005 or "Windows Forms Application" in Visual Studio 2008 from the Templates List

4. Type the project name as "OcrTutorial" in the Project Name field, and then choose OK. If desired, type a new location for your project or select a directory using the Browse button, and then choose OK.

5. In the "Solution Explorer" window, right-click on the "References" folder, and select "Add Reference..." from the context menu. In the "Add Reference" dialog box, select the ".NET" tab and browse to LEADTOOLS For .NET "\LEAD Technologies\LEADTOOLS 16.5\Bin\DotNet\Win32" folder and select the following DLLs:

   • Leadtools.dll
   • Leadtools.Codecs.dll
   • Leadtools.Forms.dll
   • Leadtools.Forms.DocumentWriters.dll
   • Leadtools.Forms.Ocr.dll
   • Leadtools.Forms.Ocr.Plus.dll
   • Leadtools.Codecs.Bmp.dll
   • Leadtools.Codecs.Cmp.dll
   • Leadtools.Codecs.Tif.dll
   • Leadtools.Codecs.Fax.dll

   Note: The Leadtools.Codecs.*.dll references added are for the BMP, JPG, CMP, TIF and FAX image file formats. Add any additional file format codec DLL if required in your application.

6. Switch to Form1 code view (Right-click Form1 in the solution explorer then select View Code) and add the following lines at the beginning of the file after any Imports or using section if there are any:

   [Visual Basic]

   
   Imports Leadtools
   Imports Leadtools.Forms
   Imports Leadtools.Forms.DocumentWriters
   Imports Leadtools.Forms.Ocr
   Imports Leadtools.ImageProcessing
        

   [C#]

   
   using Leadtools;
   using Leadtools.Forms;
   using Leadtools.Forms.DocumentWriters;
   using Leadtools.Forms.Ocr;
   using Leadtools.ImageProcessing;
        

7. Add the following private variables to the Form1 class:

   [Visual Basic]

   
   Private _ocrEngine As IOcrEngine
   Private _ocrDocument As IOcrDocument
        

   [C#]

   
   private IOcrEngine _ocrEngine;
   private IOcrDocument _ocrDocument;
        

8. Add the following code to the Form1 constructor (in Visual Basic, you can copy/paste the whole Sub New code from here):

   [Visual Basic]

   
   Sub New()
      ' This call is required by the Windows Form Designer.
      InitializeComponent()
   
      ' Add any initialization after the InitializeComponent() call.
   
      ' Unlock the OCR support
      ' Please replace with your own key
      RasterSupport.Unlock(RasterSupportType.OcrPlus, "Replace with your own key here")
   
      ' Initialize the OCR engine
      _ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Plus, False)
   End Sub
        

   [C#]

   
   public Form1()
   {
      InitializeComponent();
   
      // Unlock the OCR support
      // Please replace with your own key
      RasterSupport.Unlock(RasterSupportType.OcrPlus, "Replace with your own key here");
   
      // Initialize the OCR engine
      _ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Plus, false);
   }
        

9. Drag and drop six buttons in Form1. Leave all the buttons names as the default "button1, button2 ...", then change the Text property of each button to the following:

   Button	Text
   button1	Startup
   button2	Add Page
   button3	Remove Pages
   button4	Flip Page
   button5	Shutdown

10. Add the following code for the button1 (Startup) control’s Click handler:

    [Visual Basic]

    
    Private Sub button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles button1.Click
       ' Start up the OCR engine
       _ocrEngine.Startup(Nothing, Nothing, Nothing, Nothing)
    
       ' Create the document
        _ocrDocument = _ocrEngine.DocumentManager.CreateDocument()
    
       MessageBox.Show("OCR engine has been started successfully")
    End Sub
         

    [C#]

    
    private void button1_Click(object sender, EventArgs e)
    {
       // Start up the OCR engine
       _ocrEngine.Startup(null, null, null, null);
    
       // Create the document
        _ocrDocument = _ocrEngine.DocumentManager.CreateDocument();
    
       MessageBox.Show("OCR engine has been started successfully");
    }
         

11. Add the following code for the button2 (Add Page) control’s Click handler:

    [Visual Basic]

    
    Private Sub button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles button2.Click
       ' Add the a page from a TIF file to the OCR document
       Dim fileName As String = "C:\Users\Public\Documents\LEADTOOLS Images\Ocr1.tif"
       Dim page As IOcrPage = _ocrDocument.Pages.AddPage(fileName, Nothing)
    
       Dim pageCount As Integer = _ocrDocument.Pages.Count
    
       ' Show some information about this page
       Dim message As String = String.Format( _
          "Total pages is {0}\nLast page added size = {1} by {2}\nResolution = {3} by {4}\nBits per pixel = {5}", _
          pageCount, _
          page.Width, page.Height, _
          page.DpiX, page.DpiY, _
          page.BitsPerPixel)
       MessageBox.Show(message)
    End Sub
         

    [C#]

    
    private void button2_Click(object sender, EventArgs e)
    {
       // Add the a page from a TIF file to the OCR document
       string fileName = @"C:\Users\Public\Documents\LEADTOOLS Images\Ocr1.tif";
       IOcrPage page = _ocrDocument.Pages.AddPage(fileName, null);
    
       int pageCount = _ocrDocument.Pages.Count;
    
       // Show some information about this page
       string message = string.Format(
          "Total pages is {0}\nLast page added size = {1} by {2}\nResolution = {3} by {4}\nBits per pixel = {5}",
          pageCount,
          page.Width, page.Height,
          page.DpiX, page.DpiY,
          page.BitsPerPixel);
       MessageBox.Show(message);
    }
         

12. Add the following code for the button3 (Remove Pages) control’s Click handler:

    [Visual Basic]

    
    Private Sub button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles button3.Click
       ' Remove all added pages from the OCR document.
       _ocrDocument.Pages.Clear()
       MessageBox.Show("All the pages has been removed")
    End Sub
         

    [C#]

    
    private void button3_Click(object sender, EventArgs e)
    {
       // Remove all added pages from the OCR document.
       _ocrDocument.Pages.Clear();
       MessageBox.Show("All the pages has been removed");
    }
         

13. Add the following code for the button4 (Flip Page) control’s Click handler:

    [Visual Basic]

    
    Private Sub button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles button4.Click
       ' Get the last page added to the OCR document
       If (_ocrDocument.Pages.Count < 1) Then
          Return
       End If
    
       Dim page As IOcrPage = _ocrDocument.Pages(_ocrDocument.Pages.Count - 1)
    
       ' Get a RasterImage that represents this page
       Using image As RasterImage = page.GetRasterImage()
          ' Flip this image vertically
          Dim cmd As New FlipCommand(False)
          cmd.Run(image)
    
          ' The RasterImage is a copy of the page, so update it
          page.SetRasterImage(image)
    
          MessageBox.Show("Last page has been flipped")
       End Using
    End Sub
         

    [C#]

    
    private void button4_Click(object sender, EventArgs e)
    {
       // Get the last page added to the OCR document
       if(_ocrDocument.Pages.Count < 1)
          return;
    
       IOcrPage page = _ocrDocument.Pages[_ocrDocument.Pages.Count - 1];
    
       // Get a RasterImage that represents this page
       using(RasterImage image = page.GetRasterImage())
       {
          // Flip this image vertically
          FlipCommand cmd = new FlipCommand(false);
          cmd.Run(image);
    
          // The RasterImage is a copy of the page, so update it
          page.SetRasterImage(image);
    
          MessageBox.Show("Last page has been flipped");
       }
    }
         

14. Add the following code for the button5 (Shutdown) control’s Click handler:

    [Visual Basic]

    
    Private Sub button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles button5.Click
       ' Destory the document
       _ocrDocument.Dispose()
    
       ' Shut down the OCR engine
       _ocrEngine.Shutdown()
    
       MessageBox.Show("OCR engine has been shut down")
    End Sub
         

    [C#]

    
    private void button5_Click(object sender, EventArgs e)
    {
       ' Destory the document
       _ocrDocument.Dispose();
    
       // Shut down the OCR engine
       _ocrEngine.Shutdown();
    
       MessageBox.Show("OCR engine has been shut down");
    }
         

15. Build, and Run the program to test it.

16. Save this project to use for testing other code samples.

Reference