Multiple Submit Buttons Trapping

[Z GIRL]

Hi,

I posted previously about trapping on the PostBack function
exactly what submit button was clicked. I understand
there is __EventArgument and __EventTarget hidden fields
for a PostBack function.

My question is, on the CodeBehindForms in VB.Net,
how do you trap the PostBack event to determine the value
of the two fields.

for example

<asp:button id="btnButton1" runat="server" value=" Search 1"
type="submit"></asp:Button>
<asp:button id="btnButton2" runat="server" value=" Search 2"
type="submit"></asp:Button>
Now since there both submit buttons, you need to trap the
PostBack and determine which id has been clicked... btnButton1 or
btnButton2.

In VB.Net, how do you do this?

thanks