Thank you for writing.
Most of our controls feature the ToolTipTextNeeded event, which is fired when an element is being hovered, so you can assign its tooltip. Here is how to do this for the task elements in RadGanttView:
GanttViewTaskElement = TryCast(sender, GanttViewTaskElement)
e.ToolTipText = taskElement.Text
I hope that you find this information useful. Should you have any other questions, do not hesitate to contact us.
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