ImageButton ibSend = new ImageButton();
ibSend.ImageUrl = "images/bt_send.gif";
ibSend.ID = "ibSend";
ibSend.Click += new ImageClickEventHandler(ibSend_Click);
//Tip: after putting += just press tab twice visual studio will create the below.
void ibSend_Click(object sender, ImageClickEventArgs e)
{
//blah blah blah
}