Information about the histogram data, such as the plot sum, area, centroid, FWHM, plot max, plot min, and total counts, may be obtained from CSL in two different ways.  The most standard is to use widget properties syntax:

Max = {"HistName"}.MAX or
LCursor = {"HistName"}.LCUR

The second mechanism is to use CSL commands
 
GET SUM #Sum(IntVar)# IN #data#
GET AREA #Area(IntVar)# IN #data#
GET CENTROID #Centroid(RealVar)# IN #data#
GET FWHM #FWHM(RealVar)# IN #data#
GET MAX #Max(IntVar)# IN #data#
GET MIN #Min(IntVar)# IN #data#
GET TOTAL #Total(IntVar)# IN #data#