How find CommandBar Index

I wish to show or hide commandbars at runtime. How can I get the index of an element inside the commandbars collection?

I checked all our examples and I found only statements like this (i.e. DynamicPopups):

CommandBars(2).Visible = Not CommandBars(2).Visible

At the moment I'm following the same way (numbering commandbars from 1 to ...) but how can I get this dimamically?

Thank you