Is this possible: Hiding/destroying a constant line after it has been created ???

[User (Legacy)]

In Delphi I create a constant line with this code: 

begin 

   ChartFX1.OpenDataEX(COD_CONSTANTS,1,0); 

   ChartFX1.ConstantLine[0].Value := 15; 

   ChartFX1.ConstantLine[0].LineColor := RGB(255,0,0); 

   ChartFX1.ConstantLine[0].Axis := AXIS_Y; 

   ChartFX1.ConstantLine.Item[0].Label_ := 'Constant Value'; 

   ChartFX1.ConstantLine[0].LineWidth := 1; 

   ChartFX1.CloseData(COD_CONSTANTS); 

end; 

But then I want to hide or destroy this constant line. 

This doesn't seem to work: ChartFX1.ClearData(COD_CONSTANTS); 

Does anyone knows how to do this ? 

M.Wasbauer

chartfx.bmp