ImageGear .NET - Updated
index Field

ImageGear.Web.UI Library > ImageGear.Web.UI Namespace > PointEventArgs class : index Field
The index of the point which is most directly related to the event. If all the points were affected (such as when you call PointCollection.removeAllPoints), then this property will have the value 0 and the length property will probably be greater than 1.
Syntax
ASP.NET Ajax Javascript (Specification) 
var index : Integer;
ASP.NET Ajax Javascript (Usage) 
var resultVar = instanceOfPointEventArgs.index;
See Also

Reference

PointEventArgs class
PointEventArgs Members