constants WeekNumberAsEnum
The WeekNumberAsEnum type specifies the ways the control displays the week number for dates. The WeekNumberAs property specifies the way the control displays the week number. The FirstWeekDay property specifies the first day of the week where the week begins. The WeekNumberAsEnum type supports the following values:

NameValueDescription
exISO8601WeekNumber0 Indicates that the week number is displayed according to the ISO8601 standard, which specifies that the first week of the year is the one that includes the January the 4th
exSimpleWeekNumber1 The first week starts on January 1st of a given year, week n+1 starts 7 days after week n ( default )