Hi Paul,

I do not see an easy way to that. At the minimum you will need to do some tweaking with the build in buttons. The way the button works is:

1. User clicks the button;
2. It triggers onclick event handler (generated by ASP.NET), which calls _doPostBack;

You will need to change it to work in the following way:
1. First you need to either save the original onclick event handler or figure out how it is generated so that you can “simulate” such an action later;
2. You will then replace it with your own click handler. Your own click handler will display the dialog and return false;
3. When user clicks OK on the dialog, your code then calls the original onclick hanlder. If the user clicks CANCEL, then you do nothing;

The original onclick handler is usually a _doPostBack call (you can find out by viewing page source) but it can get rather complicated if you have validators on your page. If you also use an AJAX solution, that will further complicate the situation. As such I would recommend you to balance the complexity and the benefit before going into it. :)

Thanks