[SOLVED] Specific counting in listbox

[vixez]

Hey,
I'm having a problem and I can't seem to crack it.
Let's say these items are in a listbox

name-05.06.2010
somtext-05.06.2010
lol-06.06.2010
sth-06.06.2010
hello-06.06.2010

Each of the items has the date it was added on the back after the -
Now I select sth-06.06.2010
This is the second item of 06.06.2010
How would I get "2" in a label, as it's the second item of that date?

If I'd chose hello-06.06.2010 then 3 would appear
If I'd chose somtext-05.06.2010 then 2 would appear.

How would I count the index of it based on the date?

[vixez]

Okay, sorted it out

 'Getting all names with 06.06.2010 as date      
 For Each item In lstMails.Items
            If item.ToString.Contains("06.06.2010") Then
'add them to a different listbox
                lstSortToSelected.Items.Add(item)
            End If
        Next

        Dim itemstring As String
        Dim index As Integer

        For Each item In lstSortToSelected.Items
'if item has the same name as the selected one in lstMails, then remember the name
            If item.ToString.Contains(lstMails.SelectedItem) Then
                itemstring = item
            End If
        Next
'select the item that was remembered
        lstSortToSelected.SelectedItem = itemstring
'get the selected index
        index = lstSortToSelected.SelectedIndex

Done!