How to draw an ellipse on a frame using Video Callback Filter in C#

This example shows how to use LEAD's Raster COM objects to draw an ellipse from within our Video Callback Filter's callback function.  It uses LEAD's Raster COM objects, LEAD Multimedia COM objects, and LEAD's Video Callback Filter.  The project is written in C# with .NET 2003. 

In order to process the callback you have to create a .NET class derived from the Video Callback Filter and have the class override the Callback function.  In the attached project the class is called LEADCallback and it's implementation can be found in the file LEADCallback.cs.  I put all the code for drawing on the frame in the callback function.

Updated to LEADTOOLS v19 with Visual Studio 2017. Also changed project to automatically select dll's for running in 32-bit and 64-bit.
Extract folder to "C:\LEADTOOLS 19\Examples\DotNet\CS\" to use the example.

No longer uses Raster COM objects, instead uses the Imaging SDK directly, specifically "Leadtools.Drawing".