Is it possible to hide the VBA modules?

I have a spreadsheet which now contains several macros and one macro
that works when the workbook is closed.

However, these are viewable to anybody who goes through the Tools,
Macro toolbar within Excel..

How can I hide these so that these would only be viewable if you know
a password?

Alternatively, if it's not possible to hide these would anybody be
able to advise how to hide the actual menu itself - then I can have
the menu hiding when the workbook is opened and unhiding when its
closed.

As always, your help is greatly appreciated.

Regards, Al. ( )