protected virtual void ToolTipDrawBackground (Graphics dc, Rectangle clip_rectangle, ToolTip.ToolTipWindow control)
{
Brush back_brush = ResPool.GetSolidBrush (control.BackColor);
dc.FillRectangle (back_brush, control.ClientRectangle);
dc.DrawRectangle (SystemPens.WindowFrame, 0, 0, control.Width - 1, control.Height - 1);
}