BCGControlBar Pro for MFC
void CBCGPChartAxis::SetAutoIntervalWidth ( )

Sets automatic interval width mode.

Automatic interval width mode is a default for all charts, except historical charts (series with history mode enabled and CBCGPChartHistoricalLineSeries).

In this mode the size of major units in pixels is calculated automatically, based on diagram area size (axis size) and current scroll range (minimum and maximum displayed values).

In "fixed interval width" mode the grid size (tick mark positions, axis label positions etc) is based on interval width in pixels that you specify using SetFixedIntervalWidth().