<ItemTemplate>

<asp:DropDownList ID="ddl1" Runat=server 
AutoPostBack=True OnSelectedIndexChanged="DropDownListSelect">
</asp:DropDownList>
<asp:Label ID="lblStatus" Runat=server></asp:Label>

</ItemTemplate>

Public Sub DropDownListSelect(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim oDropDownList As DropDownList
        Dim oLabel As Label
        oDropDownList = CType(sender, DropDownList)
        oLabel = oDropDownList.Parent.FindControl("lblStatus")
        oLabel.Text = "Hello"
End Sub