BCGControlBar Pro for MFC
virtual BOOL CBCGPChartSeries::IsOptimizedLongDataMode ( ) const

Tells whether a series works in "optimized long data" mode.

This method returns TRUE if a series works in "optimized long data mode". In this mode data point values are stored as arrays of doubles and customization of individual data points is disabled.

You can turn this mode on if you call AddDataPointsOptimized().