Overloads Public Function LoadAsync( _
   ByVal stream As Stream, _
   ByVal tile As LeadRect, _
   ByVal userState As Object _
) As RasterImage

Dim instance As RasterCodecs
Dim stream As Stream
Dim tile As LeadRect
Dim userState As Object
Dim value As RasterImage
 
value = instance.LoadAsync(stream, tile, userState)

public RasterImage LoadAsync( 
   Stream stream,
   LeadRect tile,
   object userState
)

public:
RasterImage^ LoadAsync( 
   Stream^ stream,
   LeadRect tile,
   Object^ userState
) 

Public Sub LoadAsyncStream3Example()
      Dim codecs As New RasterCodecs()

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

      ' Load a random tile from the image asynchronously
      Dim tileRect As New LeadRect(100, 50, 200, 150)
      AddHandler codecs.LoadAsyncCompleted, AddressOf LoadAsyncStream3Example_LoadAsyncCompleted
      Dim stream As Stream = File.OpenRead(srcFileName)
      Dim rasterImageObject As Object = codecs.LoadAsync(stream, tileRect, 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 LoadAsyncStream3Example_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 loaded OK, size: {0} by {1}, order: {2}, bits/pixel: {3}", image.Width, image.Height, image.Order, image.BitsPerPixel)
         image.Dispose()
      End If

      ' We should close the stream here
      e.Stream.Dispose()

      ' Unsubscribe to the event and dispose the RasterCodecs object
      Dim codecs As RasterCodecs = DirectCast(sender, RasterCodecs)
      RemoveHandler codecs.LoadAsyncCompleted, AddressOf LoadAsyncStream3Example_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 LoadAsyncStream3Example()
   {
      RasterCodecs codecs = new RasterCodecs();

      string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");

      // Load a random tile from the image asynchronously
      LeadRect tileRect = new LeadRect(100, 50, 200, 150);
      codecs.LoadAsyncCompleted += new EventHandler<CodecsLoadAsyncCompletedEventArgs>(LoadAsyncStream3Example_LoadAsyncCompleted);
      Stream stream = File.OpenRead(srcFileName);
      object rasterImageObject = codecs.LoadAsync(stream, tileRect, 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 LoadAsyncStream3Example_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 loaded OK, size: {0} by {1}, order: {2}, bits/pixel: {3}", image.Width, image.Height, image.Order, image.BitsPerPixel);
         image.Dispose();
      }

      // We should close the stream here
      e.Stream.Dispose();

      // Unsubscribe to the event and dispose the RasterCodecs object
      RasterCodecs codecs = sender as RasterCodecs;
      codecs.LoadAsyncCompleted -= new EventHandler<CodecsLoadAsyncCompletedEventArgs>(LoadAsyncStream3Example_LoadAsyncCompleted);
      codecs.Dispose();
   }

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