Determining whether an object is a member of a collection in VBA

Question

How do I determine whether an object is a member of a collection in VBA?

Specifically, I need to find out whether a table definition is a member of the TableDe

Answer 1

I have some edit, best working for collections:

Public Function Contains(col As collection, key As Variant) As Boolean
    Dim obj As Object
    On Error GoTo err
    Contains = True
    Set obj = col.Item(key)
    Exit Function
    
err:
    Contains = False
End Function