/// <summary>
/// 矢量：毫米转化为英寸
/// </summary>
/// <param name="temPt"></param>
/// <returns></returns>
public static CArea MMToFeet(CArea area)
{
area.ScaleBy(1.0 / kFeetToMM);
return(area);
}
/// <summary>
/// 坐标点：英寸转化为毫米
/// </summary>
/// <param name="area"></param>
public static void FeetToMM(ref CArea area)
{
area.ScaleBy(kFeetToMM);
}