BCGSuite for MFC
void CBCGPCalendar::MarkDates ( const CArray< DATE, DATE & > &  arDates,
BOOL  bRedraw = TRUE 

Sets marked dates.

Use this function to mark a list of dates in the calendar control. Marked dates are displayed using the bold font.

arDatesContains the array of dates to mark.
bRedrawIf TRUE, the calendar control will be redrawn to reflect the new state.