I'll give it a shot

[New2VB]

I'm a new guy so I hope this is helpful.

As to the 2nd question:

I think you want to look at the ListIndex property and use it to control the flow of your application, e.g., assuming a list and a button where the trigger is the button and the list is the modifier, you might have the following:

 

Private Sub Command1_Click()
    Select Case List1.ListIndex
        Case 0
            MsgBox "Item 1"
        Case 1
            MsgBox "Item 2"
        Case 2
            MsgBox "Item 3"
    End Select
End Sub

Private Sub Form_Load()
    List1.AddItem "First"
    List1.AddItem "Second"
    List1.AddItem "Third"
End Sub

Hope it helps.

Regards
NEW2VB