With the release of GroupDocs.Conversion for .NET v19.11 you can now monitor document conversion progress and status using C#. There are way many conversions supported by the API, that are listed in the documentation.
A new property Listener is added. The document converter listener implementation is used for monitoring conversion status and progress. Have a look at ConverterListener class that implements IConverterListenerinterface
Below is the usage
Coming to the improvement, MPP to XLS conversion is improved.... PNG to Word or Presentation). This issue is now fixed...