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       How to: Determine which Chart Element is Hovered by the Mouse Pointer
       How to: Display Custom Tooltips for Series Points
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How to: Display Custom Tooltips for Series Points

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A complete sample project is available in the DevExpress Code Examples database at http://www.devexpress.com/example=E1376.

This example demonstrates how to display custom information from the underlying datasource in a custom tooltip for every data point.

To accomplish this, it is necessary to handle the chart's MouseMove event, obtain the current SeriesPoint via the ChartControl.CalcHitInfo method, and if the series point is not null (Nothing in Visual Basic), display a tooltip with its information.

Note that in addition to the MouseMove event, it is also necessary to handle the MouseLeave, to hide the tooltip when the mouse pointer is not over the chart.

If you wish to learn how to use built-in tooltips in your application, see the Tooltip topic.

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