protected override CreateParams CreateParams
        {
            get
            {
                CreateParams cp = base.CreateParams;
                cp.ExStyle &= (~NativeMethods.WS_EXCLIENTEDGE);
                cp.Style &= (~NativeMethods.WS_BORDER);

                switch(borderStyle)
                {
                    case BorderStyle.Fixed3D:
                        cp.ExStyle |= NativeMethods.WS_EXCLIENTEDGE;
                        break;
                    case BorderStyle.FixedSingle:
                        cp.Style |= NativeMethods.WS_BORDER;
                        break;
                }
                return cp;
            }
        }

        public override BorderStyle BorderStyle
        {
            get
            {
                return borderStyle;
            }
            set
            {
                if(borderStyle != value)
                {
                    if(!Enum.IsDefined(typeof(BorderStyle), value))
                    {
                        throw new InvalidEnumArgumentException("value", (int)value, typeof(BorderStyle));
                    }
                    borderStyle = value;
                    UpdateStyles();
                }
            }
        }