color of DateTimePicker?

        {
            private const int WM_ERASEBKGND = 0x0014;

            private Control _control;
            private SolidBrush _brush;

            private void OnHandleDestroyed(object sender, EventArgs e)
            {
                Detach();
            }

            public BackColorWorkaroundSubclass(Control control)
            {
                Attach(control);
            }

            public void Attach(Control control)
            {
                this._control = control;
                this._brush = new SolidBrush(this._control.BackColor);
                AssignHandle(this._control.Handle);
                this._control.HandleDestroyed += new EventHandler(OnHandleDestroyed);
            }

            public void Detach()
            {
                ReleaseHandle();
                this._brush = null;
            }

            protected override void WndProc(ref Message message)
            {
                if (message.Msg == WM_ERASEBKGND)
                {
                    using (Graphics graphics = Graphics.FromHdc(message.WParam))
                    {
                        graphics.FillRectangle(this._brush, this._control.ClientRectangle);
                    }
                }
                else
                {
                    base.WndProc(ref message);
                }
            }
        }