Listening to an ErrorList ToolWindow event

I'm working on an extension that shows ErrorList ToolWindow's errors inside another ToolWindow in another language.

I'm almost done, but I only managed to show these errors when the user builds the project (I'm listening to the build events).

Is there any ErrorList event or other events that I can listen to show the errors interactively to the user like what visual studio does?

Any other suggestion that can help me achieve interactivity can be helpful.