Hi Pisin,
Sorry for the delay in responding.
CalcRegions property should be set to true when RegionHit events are used.
Please refer to the following online documentation for more details:
http://www2.syncfusion.com/ug/Default.aspx##Essential%20Studio.chm/ChartWindows/Performance1.htmlI am able to reproduce the issue of MouseMove event of the ChartControl not being fired when CalcRegions property of the ChartControl is set to false.
Could you please create a Direct-Trac incident with the subject "ChartRegionMouseMove event not fired in version 5.1.0.51 - F65138" so that we could give more details regarding the fix?
We appreciate your interest in Syncfusion products.
Best regards,
Golda