protected override void WndProc(ref System.Windows.Forms.Message m)//zhaosn

        {

            base.WndProc(ref m);

            if (m.Msg == 132)

            {

                if ((IntPtr)1 == m.Result)

                {

                    m.Result = (IntPtr)2;

                }

            }

        }

 

this.WindowState = FormWindowState.Normal;

this.WindowState = FormWindowState.Maximized;