Shape's Index number?

Hello,

When we are working with Shape Objects (Lines,...) we have two options to work with them:
1) Shape’s names, which look like: Shapes(“Line 27”) or
2) Index number, which look like: Shapes(2)
That’s OK, but how should I get the Shape’s Index Number. Excel assigned them a default value. There's no problem with geting the Shape Name but I can't find out how to get the Shape’s Index Number.

Thank you in advance & Happy NY