Block Popup windows in browser

Question

Hello
M working on C#.net windows application i have used AxSHDocVw.AxWebBrowser in my application. i want to block popup windows for my code. How do i go about it.
i tried doing

private void axWebBrowser1_NewWindow2(object sender, AxSHDocVw.DWebBrowserEvents2_NewWindow2Event e)
{
e.ppDisp = null;
e.cancel = true;
}
But this is not helping