You haven't said what you want to do with them once you find them, so it's
hard to be specific. In general, you'd run a loop like this:

Dim oShp As Shape
For Each oShp in ActiveDocument.Shapes
  ' do something -- select, format, delete, etc.
Next oShp

Inside that loop, you can examine the value of oShp.Type to find out whether
it's an autoshape, a textbox, or something else, so you can be more exact
about which shapes you "do something" with.

If the document contains both floating and in-line shapes, you'll have to
handle them in separate loops because they're in separate collections.

Dim oILShp As InlineShape
For Each oILShp in ActiveDocument.InlineShapes
  ' do something -- select, format, delete, etc.
Next oILShp

The two types of shape objects have different properties and methods, so
what you can do with them differs.