I'm using Excel 2007 and would like to show the active workbook's file
size somewhere on the UI, dynamically updated when the file is saved,
opened, activated, etc. I have a custom ribbon tab, but I don't think
you can show any sort of dynamic label on there, unless I"m mistaken.
I don't want it to be a button you click and have a msgbox pop up or
that sort of thing.

What method should I be pursuing here? I can't find any sort of way to
show this on the status bar, QAT, a custom ribbon tab, etc.

Thanks for your help!