protected override void WndProc(ref Message m){                if (m.Msg==0x112)    {        switch ((int) m.WParam)        {            //禁止双击标题栏关闭窗体            case 0xF063:            case 0xF093:                m.WParam = IntPtr.Zero;                break;            //禁止拖拽标题栏还原窗体            case 0xF012:            case 0xF010:                m.WParam = IntPtr.Zero;                break;           //禁止双击标题栏            case 0xf122:                m.WParam = IntPtr.Zero;                break;            //禁止关闭按钮            case 0xF060:                m.WParam = IntPtr.Zero;                break;            //禁止最大化按钮            case 0xf020:                m.WParam = IntPtr.Zero;                break;            //禁止最小化按钮            case 0xf030:                m.WParam = IntPtr.Zero;                break;            //禁止还原按钮            case 0xf120:                m.WParam = IntPtr.Zero;                break;           }    }                base.WndProc(ref m);}