void SetPadding()
{
Rectangle rect = ContentRectangle;
base.Padding = new Padding((rect.Left - ClientRectangle.Left) + m_textPadding.Left,
(rect.Top - ClientRectangle.Top) + m_textPadding.Top, (ClientRectangle.Right - rect.Right) + m_textPadding.Right,
(ClientRectangle.Bottom - rect.Bottom) + m_textPadding.Bottom);
}