BCGControlBar Pro for MFC
void CBCGPChartLegendVisualObject::ShowLegendTitle ( BOOL  bShow,
const CString &  strTitle = _T(""),
BOOL  bRedraw = TRUE 

Shows or hides legend title and sets new title text

Call this method to show or hide legend title, or set a new title. Also legend title will disappear if you pass empty string.

bShowspecifies whether to show or hide legend title
strTitlespecifies legend title
bRedrawspecifies whether a legend should be redrawn