<asp:Repeater ID="repPushedItems" runat="server">
  <ItemTemplate>
    <asp:ImageButton ID="btnInBasket" CssClass="itemBuyButton" _
      ImageUrl="../../img/Basket_16_16.jpg" CommandArgument="btnInBasket" _
      runat="server" />
  </ItemTemplate>
</asp:Repeater>

<asp:Repeater ID="repPushedItems" runat="server">
   <ItemTemplate>
     <asp:LinkButton ID="btnInBasket" CommandArgument="btnInBasket" _
       runat="server">Buy</asp:LinkButton>
   </ItemTemplate>
</asp:Repeater>

Protected Sub repPushedItems_ItemCommand(ByVal source As Object, ByVal e As _
  System.Web.UI.WebControls.RepeaterCommandEventArgs) Handles _
  repPushedItems.ItemCommand
  Response.Write("Hier sollte was ausgegeben werden, funktioniert aber nur mit" & _
  "einem LinkButton")
End Sub