How to find a specific task's UI element?

private void FindTaskUIButton_Click(object sender, RoutedEventArgs e)

{

// The top-level container of all the task rows.

FlexyGanttChartRows chartRowsItemsControl = Extensions.GetChild<FlexyGanttChartRows>(this.fxgantt.GanttChart, false);

// A specific row

TasksListControl chartRow = chartRowsItemsControl.ItemContainerGenerator.ContainerFromIndex(4) as TasksListControl;

// Or do this to retrieve by a bound item (employee for example) of a row.

//TasksListControl chartRow = chartRowsItemsControl.ItemContainerGenerator.ContainerFromItem(employee) as TasksListControl;

// The UI for a specific task

TaskItemControl itemControl = chartRow.ItemContainerGenerator.ContainerFromIndex(0) as TaskItemControl;

// Or do this to retrieve by the bound item (an employee's task for example).

//TaskItemControl itemControl = chartRow.ItemContainerGenerator.ContainerFromIndex(employeeTask) as TaskItemControl;

// Set some effect on the UI to highlight

itemControl.Effect = new DropShadowEffect() { Color = Colors.Black, Direction = 320, ShadowDepth = 2, BlurRadius = 5, Opacity = 0.5 };

}