用户单击ASP.Net DetailsView的“新建”按钮时触发的事件

In an ASP.Net VB.Net code-behind file, can you tell me what event fires that I can use to trap when the user clicks on the "New" button of a DetailsView at the time the DetailsView shows blank items such as DropDownLists, TextBoxes etc?In an ASP.Net VB.Net code-behind file, can you