鼠标划过comboBox 改变边框颜色 - 苏飞论坛

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      protected override void OnMouseEnter(EventArgs e)

        {

            _mouseEnter = true;



            IntPtr hDC = IntPtr.Zero;

            Graphics gdc = null;

            hDC = Win32.GetWindowDC(this.Handle);

            gdc = Graphics.FromHdc(hDC);



           // gdc.DrawImage(Shared.MouseMoveDrawButton, new Rectangle(this.Width - 20, 3, 16, 16));

            ControlPaint.DrawBorder(gdc, new Rectangle(0, 0, Width, Height), Color.DodgerBlue, ButtonBorderStyle.Solid);

            //画坚线

            ControlPaint.DrawBorder(gdc, new Rectangle(Width - Height, 0, Height, Height), Color.DodgerBlue, ButtonBorderStyle.Solid);

            //g.DrawLine(new Pen(Brushes.Blue, 2), new PointF(this.Width - this.Height, 0), new PointF(this.Width - this.Height, this.Height));



            Win32.ReleaseDC(this.Handle, hDC);

            gdc.Dispose();



            base.OnMouseEnter(e);

        }