Overloads Public Function LoadAsync( _
   ByVal fileName As String, _
   ByVal userState As Object _
) As RasterImage

Dim instance As RasterCodecs
Dim fileName As String
Dim userState As Object
Dim value As RasterImage
 
value = instance.LoadAsync(fileName, userState)

public RasterImage LoadAsync( 
   string fileName,
   object userState
)

public:
RasterImage^ LoadAsync( 
   String^ fileName,
   Object^ userState
) 

Public Sub LoadAsyncFile1Example()
      Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp")

      Dim codecs As New RasterCodecs()

      ' Now load the image asynchronously
      AddHandler codecs.LoadAsyncCompleted, AddressOf LoadAsyncFile1Example_LoadAsyncCompleted
      Dim rasterImageObject As Object = codecs.LoadAsync(srcFileName, Nothing)

      ' Notice that the returned rasterImageObject is a RasterImage with IsLoading set to true at this point
      ' The IsLoading will be false (and hence, the object will be usable) when the LoadAsyncCompleteted
      ' fires.
   End Sub

   Private Sub LoadAsyncFile1Example_LoadAsyncCompleted(ByVal sender As Object, ByVal e As CodecsLoadAsyncCompletedEventArgs)
      If e.Cancelled Then
         Console.WriteLine("User canceled")
      ElseIf Not IsNothing(e.Error) Then
         Console.WriteLine("Error: " + e.Error.Message)
      Else
         ' Everything is OK, get the image
         Dim image As RasterImage = e.Image
         Console.WriteLine("Image at {0} loaded OK, size: {1} by {2}", e.FileName, image.Width, image.Height)
         image.Dispose()
      End If

      ' Unsubscribe to the event and dispose the RasterCodecs object
      Dim codecs As RasterCodecs = DirectCast(sender, RasterCodecs)
      RemoveHandler codecs.LoadAsyncCompleted, AddressOf LoadAsyncFile1Example_LoadAsyncCompleted
      codecs.Dispose()
   End Sub

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

public void LoadAsyncFile1Example()
   {
      string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");

      RasterCodecs codecs = new RasterCodecs();

      // Now load the image asynchronously
      codecs.LoadAsyncCompleted += new EventHandler<CodecsLoadAsyncCompletedEventArgs>(LoadAsyncFile1Example_LoadAsyncCompleted);
      object rasterImageObject = codecs.LoadAsync(srcFileName, null);

      // Notice that the returned rasterImageObject is a RasterImage with IsLoading set to true at this point
      // The IsLoading will be false (and hence, the object will be usable) when the LoadAsyncCompleteted
      // fires.
   }

   private void LoadAsyncFile1Example_LoadAsyncCompleted(object sender, CodecsLoadAsyncCompletedEventArgs e)
   {
      if(e.Cancelled)
      {
         Console.WriteLine("User canceled");
      }
      else if(e.Error != null)
      {
         Console.WriteLine("Error: " + e.Error.Message);
      }
      else
      {
         // Everything is OK, get the image
         RasterImage image = e.Image;
         Console.WriteLine("Image at {0} loaded OK, size: {1} by {2}", e.FileName, image.Width, image.Height);
         image.Dispose();
      }

      // Unsubscribe to the event and dispose the RasterCodecs object
      RasterCodecs codecs = sender as RasterCodecs;
      codecs.LoadAsyncCompleted -= new EventHandler<CodecsLoadAsyncCompletedEventArgs>(LoadAsyncFile1Example_LoadAsyncCompleted);
      codecs.Dispose();
   }

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