I'm using Visual Basics.NET 2002.
My form has 1 ComboBox, 1 ListBox and 3 Buttons.

Private Sub form_load...
ComboBox.Items.Add("Cherry")
ComboBox.Items.Add("Grape")
ComboBox.Items.Add("Mango")
End Sub

Private Sub ComboBox1_SelectedIndexChanged...
ListBox.Items.Add(ComboBox.SelectedItem)
End Sub

Private Sub ButtonClearList_Click
ListBox.Items.Clear
End Sub

Private Sub ButtonRemoveFruit_Click
If ListBox.SelectedIndex = -1 Then
MsgBox("No fruit was choosen.")
Else
Dim I As Integer = ListBox.SelectedIndex
ListBox.Items.RemoveAt(I)
End If
End Sub

Private Sub ButtonShowAllMyFruits_Click...
'After I picked, 1 Cherry, 2 Grapes and 4 Mangos from the ComboBox, _
'my chosen fruits will appear in the ListBox.
'How do I show all my choices in a message box?
'I want the message box to say "You picked 1 cherry, 2 grapes and 4 mangos.")
End Sub