public Area UserToDevice(Area a)
{
double x, y, x2, y2, x3, y3;
x = a.Start.X;
y = a.Start.Y;
CContext.UserToDevice(ref x, ref y);
Area ua = new Area(new Point(x, y), 0, 0);
x2 = a.TopRight.X;
y2 = a.TopRight.Y;
CContext.UserToDevice(ref x2, ref y2);
ua.Width = x2 - x;
x3 = a.BottomLeft.X;
y3 = a.BottomLeft.Y;
CContext.UserToDevice(ref x3, ref y3);
ua.Height = y3 - y;
return(ua);
}