I'm not sure this is possible in Excel, but here is what
I need:

I have several worksheets in a workbook, which is located
on a shared drive for all employees to use. I have one
of the worksheets hidden. After I unhide and update this
worksheet, I ALWAYS want to hide it before closing the
file. Is there a way to receive a pop-up message
reminding me to hide the worksheet before closing the
file?