You can add a header to the FlexPie control by setting the Header property of FlexChartBase. Besides a header, you can add a footer to the control by setting the Footer property of FlexChartBase.

See the following code snippet for setting the two properties:

' set the Header
FlexPie1.Header.Content = "Sales Data"

' set the Footer
FlexPie1.Footer.Content = "In 2015"

// set the Header
flexPie1.Header.Content = "Sales Data";

// set the Footer
flexPie1.Footer.Content = "In 2015";