Can contain a rich formatted Text. If this property is not null then this formatted Text value overrides auto-generated Text. Auto-generated Text is an implicit property of the data label, the display unit label of the value axis, the axis title, the chart title, the label of the trendline. Auto-generated Text is formatted with the IFormattedTextContainer::get_TextFormat property. Read-only ITextFrame....Can contain a rich formatted text. If this property is not null...formatted text value overrides auto-generated text. Auto-generated...