assigning an event to a command button

I have the following HTML in a webform within a datagrid (among other columns):

<asp:ButtonColumn Text="Coverage" ButtonType="PushButton" CommandName="btnCoverage"></asp:ButtonColumn>

I would like to somehow associate a "click" event with this button. However, there is no "Onclick" event associated with it. I also went to the code-behind page to see if I can somehow associate an event with this and none showed up in any of the dropdown lists from within the code-behind page.

This command button was built using the property builder of the asp.net datagrid.

How can I associate a click event with this button???

I placed the following on the aspx code-behind page that took care of the problem:

Private Sub DataGrid1_ItemCommand(ByVal sender As System.Object, ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs ) Handles DataGrid1.ItemCommand

If e.CommandName = "btnCoverage" Then 'Retrieve the row where the button was pressed
bytSelectedRow = e.Item.ItemIndex
End If

End Sub