Try this. The following example requires a Form with 2 CommandButtons and a ListBox
Code:
Dim X As Collection
Private Sub Command1_Click()
'Add an item to the collection
X.Add InputBox("Enter a name")
End Sub
Private Sub Command2_Click()
'Display all the items in the collection
For I = 1 To X.Count
List1.AddItem X(I)
Next I
End Sub
Private Sub Form_Load()
'Create the collection
Set X = New Collection
End Sub