The UpdateFlags constants listed below can be used in various events to determine what part of the chart is being updated.
| Constant | Value | Description |
| VtChNoDisplay | 0 | Absence of update flags; the chart display is not affected. |
| VtChDisplayPlot | 1 | Update will cause the plot to repaint. |
| VtChLayoutPlot | 2 | Update will cause the plot to layout. |
| VtChDisplayLegend | 4 | Update will cause the legend to repaint. |
| VtChLayoutLegend | 8 | Update will cause the legend to layout. |
| VtChLayoutSeries | 16 | Update will cause the series to lay out. |
| VtChPositionSection | 32 | A chart section has been moved or resized. |
Remarks
The constants can be used in the following events:
AxisLabelUpdated Event
AxisTitleUpdated Event
AxisUpdated
ChartUpdated Event
DataUpdated Event
FootnoteUpdated Event
LegendUpdated Event
PlotUpdated Event
PointLabelUpdated Event
PointUpdated Event
SeriesUpdated Event
TitleUpdated Event