I'd like to get the index of the selected item in a ListBox in VBA.
In real VB I do it with the following code:

Private Declare Function SendMessage Lib "user32" Alias
"SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam
As Long, lParam As Any) As Long

Private Sub UserForm_Initialize()
Dim Counter As Long

ListBox1.Clear

For Counter = 1 To 20
ListBox1.AddItem "MyItem " & Counter
Next

CommandButton1.Caption = "Index of selected Item"
End Sub

Private Sub CommandButton1_Click()
MsgBox (SendMessage(ListBox1.hWnd, &H19F, 0, 0))
End Sub

But how can I do it in VBA (e.g. Excel)?