BCGControlBar Pro for MFC
BOOL CBCGPChartAxis::AddScaleBreak ( const CBCGPChartAxisScaleBreak scaleBreak,
BOOL  bCreateScaleParts = TRUE 

Adds a new scale break.

Call this method to add a new scale break. This method should be used if the axis uses manual scale breaks (EnableScaleBreaks() was called with CBCGPChartScaleBreakOptions::m_bAutomatic set to FALSE).

scaleBreakA reference to a scale break to add.
bCreateScalePartsIf TRUE the axis will re-generate scale parts. Leave this as FALSE for subsecuent calls if you're adding several scale breaks (except the last call).