constants SortTypeEnum
The SortTypeEnum enumeration defines the ways how the control can sort the columns. Use the SortType property to specify how the column gets sorted. The CellValue property indicates the values being sorted.

NameValueDescription
SortString0 (Default) Values are sorted as strings.
SortNumeric1 Values are sorted as numbers. Any non-numeric value is evaluated as 0.
SortDate2 Values are sorted as dates. Group ranges are one day.
SortDateTime3 Values are sorted as dates and times. Group ranges are one second.
SortTime4 Values are sorted using the time part of a date and discarding the date. Group ranges are one second.
SortUserData5 The CellData property indicates the values being sorted. Values are sorted as numbers.
SortUserDataString6 The CellData property indicates the values being sorted. Values are sorted as strings.
exSortByValue16 The column gets sorted by cell's value rather than cell's caption.
exSortByState32 The column gets sorted by cell's state rather than cell's caption.
exSortByImage48 The column gets sorted by cell's image rather than cell's caption.