BCGControlBar Pro for MFC
BOOL CBCGPChartVisualObject::ShowSeries ( BOOL  bVisible = TRUE,
int  nSeries = 0,
BOOL  bIsSecondaryAxis = FALSE 
)

Shows or hides a series.

Also it allows to show a series on a primary or secondary axes depending on bIsSecondaryAxis parameter.

Parameters
bVisibleTRUE - show a series; FALSE - hide a series.
nSeriesSpecifies series index.
bIsSecondaryAxisTRUE - show a series on secondary axes; FALSE - show a series on primary axes.