constants SortTypeEnum
The SortTypeEnum enumeration defines the types of sorting in the control. Use the SortType property to specifies the type of column's sorting.

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 column gets sorted numerical using the CellData property. 
SortCellData6 The column gets sorted numerical using the CellSortData property. 
SortCellDataString7 The CellSortData property indicates the values being sorted. The values are sorted as string.
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.