ScreenCaptureException Class

Visual Basic
C#
Objective-C
Java
C++

[SerializableAttribute()]
public class ScreenCaptureException : Leadtools.LeadtoolsException, System.Runtime.InteropServices._Exception, System.Runtime.Serialization.ISerializable

'Declaration
 
<SerializableAttribute()>
Public Class ScreenCaptureException 
   Inherits Leadtools.LeadtoolsException
   Implements System.Runtime.InteropServices._Exception, System.Runtime.Serialization.ISerializable

'Usage
 
Dim instance As ScreenCaptureException

[SerializableAttribute()]
public ref class ScreenCaptureException : public Leadtools.LeadtoolsException, System.Runtime.InteropServices._Exception, System.Runtime.Serialization.ISerializable

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
 Imports Leadtools.Codecs
 Imports Leadtools.ScreenCapture

 Public Sub scEngine_CaptureInformation(ByVal sender As Object, ByVal e As ScreenCaptureInformationEventArgs) Handles scEngine.CaptureInformation
     ' Define codecs class object to save the image
     Dim codecs As New RasterCodecs()
     codecs.ThrowExceptionsOnInvalidImages = True

     ' Save the resulted Image
   codecs.Save(e.Image, Path.Combine(LEAD_VARS.ImagesDir, "CapturedImage.bmp"), RasterImageFormat.Bmp, 24)


   ' NOTE: e.Information is a ScreenCaptureInformation structure filled with information
   ' about the captured image, this information can be used here
   ' Display a MessageBox with the bounds of the capture area
   MessageBox.Show("Captured Area Bounds:" & Environment.NewLine & "Top:" & e.Information.Area.Top.ToString() & Environment.NewLine & "Left:" & _
                   e.Information.Area.Left.ToString() & Environment.NewLine & "Right:" + e.Information.Area.Right.ToString() & Environment.NewLine & _
                   "Bottom:" & e.Information.Area.Bottom.ToString())

   ' everything worked fine
   e.Cancel = False
End Sub

WithEvents scEngine As ScreenCaptureEngine

Public Sub ScreenCaptureExceptionExample()
   ScreenCaptureEngine.Startup()
   Dim captureInformation As ScreenCaptureInformation = Nothing
   scEngine = New ScreenCaptureEngine()

   Try
      MessageBox.Show("After you close this message box," & Environment.NewLine & "press F11 to capture the wallpaper.")
      Dim image As RasterImage = scEngine.CaptureWallpaper(captureInformation)
   Catch ex As ScreenCaptureException
      ' LEADTOOLS ScreenCapture Error
      MessageBox.Show(String.Format("Could not capture wallpaper.{0}ScreenCapture error code: {1}{0}Message: {2}", Environment.NewLine, ex.Code, ex.Message))
   Catch ex As Exception
      ' Other errors
      MessageBox.Show(String.Format("Could not capture wallpaper.{0}{1}", Environment.NewLine, ex.Message))
   End Try
   ScreenCaptureEngine.Shutdown()
End Sub

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

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ScreenCapture;

void scEngine_CaptureInformation(object sender, ScreenCaptureInformationEventArgs e)
{
   // Make sure that the image was captured successfully
   Debug.Assert(e.Image != null);
   // Define codecs class object to save the image
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;

   // Save the resulted Image
   codecs.Save(e.Image,Path.Combine(LEAD_VARS.ImagesDir,"Out_CapturedImage.bmp"), RasterImageFormat.Bmp, 24);


   // NOTE: e.Information is a ScreenCaptureInformation structure filled with information
   // about the captured image, this information can be used here
   // Display a MessageBox with the bounds of the capture area
   MessageBox.Show("Captured Area Bounds:\n" +
      "Top:" + e.Information.Area.Top.ToString() + "\n" +
      "Left:" + e.Information.Area.Left.ToString() + "\n" +
      "Right:" + e.Information.Area.Right.ToString() + "\n" +
      "Bottom:" + e.Information.Area.Bottom.ToString());

   // everything worked fine
   e.Cancel = false;
}


public void ScreenCaptureExceptionExample()
{
   ScreenCaptureEngine.Startup();
   ScreenCaptureEngine scEngine = new ScreenCaptureEngine();
   ScreenCaptureInformation captureInformation = null;
   scEngine.CaptureInformation += new EventHandler<ScreenCaptureInformationEventArgs>(scEngine_CaptureInformation);

   try
   {
      MessageBox.Show("After you close this message box,\npress F11 to capture the wallpaper.");
      RasterImage image = scEngine.CaptureWallpaper(captureInformation);
   }
   catch (ScreenCaptureException ex)
   {
      //LEADTOOLS ScreenCapture Error
      MessageBox.Show(string.Format("Could not capture wallpaper.{0}ScreenCapture error code: {1}{0}Message: {2}", Environment.NewLine, ex.Code, ex.Message));
   }
   catch (Exception ex)
   {
      // Other errors
      MessageBox.Show(string.Format("Could not capture wallpaper.{0}{1}", Environment.NewLine, ex.Message));
   }
   ScreenCaptureEngine.Shutdown();
}

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

Target Platforms

Reference

ScreenCaptureException Members
Leadtools.ScreenCapture Namespace
Implementing Screen Capture
ScreenCaptureEngine Class
ScreenCaptureInformation Class
ScreenCaptureInformationEventArgs Class
ScreenCaptureOptions Structure
ScreenCaptureAreaOptions Structure
ScreenCaptureObjectOptions Structure