Hi,

we never tried .NET + DDE so I'm not sure we can help you.
Did you verify that the events from the Lightstreamer connection were received by your listenrs?

We have a couple of demos that feed data into excel:

Java+DDE: https://github.com/Weswit/Lightstrea...ist-client-dde
.NET+RTD: https://github.com/Weswit/Lightstrea...ist-client-rtd


HTH