/// <summary>
/// 绘制边框句柄
/// </summary>
/// <param name="g"></param>
/// <param name="rect"></param>
private void DrawBorderHandler(Graphics g, CustomRectangle rect, Color clr)
{
g.FillRectangle(new SolidBrush(clr), rect.ToRectangleF());
g.DrawRectangle(new Pen(Color.Black), rect.ToRectangle());
}
