I installed visual studio 2019 community and CorelDraw 2020 and could open the visual studio editor. However, when I edit the addon in visual studio, I could not start the debugging.
When I start the debugging, visual studio 2019 community will show the message:
Cannot start debugging. Pre-debugging negotiation with Host failed.
What's more, the change of code in visual studio could not be saved in CorelDraw.
I tried to uninstalled CorelDraw 2020 and reinstalled, uninstalled visual studio 2019 community and reinstalled, uninstalled visual studio tools for applications 2019 and reinstalled, I tried to repair them and so on. However, it still doesn't work.
This problem has been bothering me for a long time, I have no idea to solve it.
Hope someone could help me to solve it.
Did you try using Visual Studio 2017 Community to see if that functions?
Try creating a stand-alone desktop app that communicates with the existing Corel application object.