Button click within repeater VB

Hi I have the following repeater, its displaying a list of products that have been displayed due to certain criteria specified.
I have added 2 button, but i don't know how i can access the button click on event on them, as they are within the repeater...
when i click one of the buttons, i need to capture the productID for the item within the repeater it is clicked for... below is the code for the repeater....
could any one help me, using VB code?

<asp:Repeater ID="repFavourites" runat="server">
<ItemTemplate>
<div style="border: 1px black solid;margin-bottom:5px;">
<div>
<a href="Product.aspx?ProductID=<%#Container.DataItem("ProductID")%>"><%#Container.DataItem("Title")%></a>
</div>
<div style="height:150px;width:150px;">
<a href="Product.aspx?ProductID=<%#Container.DataItem("ProductID")%>">
<img alt="" height="150px" width="150px" src="images/<%#Container.DataItem("ImageURL")%>" border="0" /></a>
</div>
<div style="position:relative;top:-130px;left:160px">
<%#Container.DataItem("Description")%>
</div>
<asp:Button ID="Button1" runat="server" Text="Remove From Favourites" />
<asp:Button ID="Button2" runat="server" Text="Purchase Item" />
</div>
</ItemTemplate></asp:Repeater>