问题
I'm writing a VBE/VBIDE add-in and I have a tool window that changes based on the open CodePane objects. Is there an event I can monitor when a code pane is added or removed from the CodePanes collection?
The CodePanes collection itself appears to have no Events associated with it.
If there is no event available, I'm open to other workarounds. Polling would be a reliable fallback, but I'd rather not go that route if I could avoid it.
来源：https://stackoverflow.com/questions/44391917/event-raised-when-closing-or-opening-a-codepane