title: Delphi Tchart x and y values in zoomed rectangle
body: <p>I have a tchart series that contains 5000 points from a data base.
  I can zoom in on a particular section of the data with the mouse.
  I wish to copy only the x and y values that are visible in the subset to the clipboard (or text file).
  I can easiy access the entire series,  however I have not been able to figure out how to access only
  the data in the zoomed rectangle.</p>
  
  <p>Any help is appreciated.
  Thanks in advance
  Arthur</p>