RD executes while VBE is not opened yet

[eteichm]

I observed that RD executes while I hadn't opened the VBE yet. I got a message from RD while I was doing calculations in Excel. I don't remember the message.
It would be better to only execute Rubberduck when opening the VBE, if possible.

[retailcoder]

RD only loads once the VBE attaches its add-ins. If you opened the VBE once, and then closed it, RD is still running - I don't think the VBIDE API gives us a clue when the VBE mainwindow is closed...

[retailcoder]

This can be confirmed by attaching the VS debugger to an EXCEL.EXE process: symbols are only loaded when the VBE is commanded to open, and only then does _Extension.OnConnection run. The add-in only tears down (well, tries to) when the VBE calls OnDisconnection for its add-ins; my understanding is that this only happens when the host application is closing, or when the add-in is manually unloaded.

[retailcoder]

Did the calculations involve user-defined functions by any chance?

[eteichm]

No, the calculations did not involve user-defined functions.
Well noted that if I don't want RD to run, I have to close and reopen Excel after opening the VBE.

[retailcoder]

Perhaps we could try to determine if the VBE mainwindow is visible... this might be as trivial as checking VBE.MainWindow.Visible...

[retailcoder]

Yup. Let's add a configuration setting to determine whether to parse anything in the background when the VBE is hidden.