BCGControlBar Pro for MFC
void CBCGPChartSeries::SetDataLabelContentPadding ( const CBCGPSize sz,
int  nDataPointIndex = -1 

Sets data label content padding.

Call this method to set data label content padding in pixels (the gap between data label text and bounds of data label rectangle).

szSpecifies the new size.
nDataPointIndexSpecifies a data point index. Use -1 to set the option for a series.