property Chart.ShowNotes as Boolean
Specifies whether all notes or boxes are shown or hidden.

Boolean A Boolean expression that specifies whether the chart shows or hides the notes associated with DATEs ot BARs. 
By default, the ShowNotes property is True. Use the ShowNotes property to show or hide the notes in the chart area. The Clear method removes all notes in the control. Use the Remove method to remove a specific Note in the collection. Use the Add method to add new notes to the chart area. Use the NoteFromPoint property to access the note from the cursor. Use the Visible property to show or hide a specific note, or use the PartVisible property to specify whether the start or ending part of the note is visible or hidden. The ShowLink property specifies whether the link between parts of the notes is visible or hidden. The ClipTo property specifies the limits of the notes within the chart.

The following screen shot shows notes associated with a BAR: