Auto execute upon workbook retrieval
 

I'm converting a LOTUS spreadsheet, which has many Macros, to EXCEL and VB.
In LOTUS you can have a Macro, which is named /0, that will execute
automatically upon retrieval. This macro can activate a Menu, which is
similar to a UserForm. Is there a way that I can do this in EXCEL? Also, in
LOTUS you can take the Menu down and re-activate it by executing the /0 macro
manually. This would also be desireable.

Tom