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 SharpPlot Reference > PageMap Class > FindChart Method PageMap.FindChart Method
Report the name of the chart at these (x,y) co-ordinates. 
public string FindChart(
    double x,
    double y
);
Example
pm = sp.RenderPageMap();  
cht = pm.FindChart(100,100); 
- 
x
 - Cursor-x in points.
 - 
y
 - Cursor-y in points.
 - 
return value
 - Chart name at this location (null string if none).
  
This can be used to check that the cursor is over a valid chart region (bounded bt rectangular axes) before attempting to convert points to axis values. 
See also ...Active charts in GUI Applications | PageMap.PageMap Members | PageMap.PointsToAxes Method 
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