屏蔽鼠标滑轮滚动事件

cmbBuilding.MouseWheel += new MouseEventHandler(cmbBuilding_MouseWheel);        private void cmbBuilding_MouseWheel(object sender, MouseEventArgs e)        {            System.Windows.Forms.HandledMouseEventArgs hme = (System.Windows.Forms.HandledMouseEventArgs)e;            hme.Handled = true;        }