void CBCGPChartSeries::SetDataLabelDropLineToMarker	(	BOOL	bDrop,
		int	nDataPointIndex = -1
	)

Sets option to connect data label and data marker by line (draw callout).

Parameters

bDrop	TRUE- draw a connection line, FALSE - otherwise.
nDataPointIndex	Specifies a data point index. Use -1 to set the option for a series.