• If false is set, the value from Start will be used as start value for the grouping.
• If true is set, the start value for the grouping will be calculated automatically from the minimum of all member values of the DataPilot field.

• If false is set, the value from End will be used as end value for the grouping.
• If true is set, the end value for the grouping will be calculated automatically from the maximum of all member values of the DataPilot field.

• If false is set, and GroupBy contains zero, grouping is performed inplace on the item values.
• If false is set, and GroupBy contains one or more flags from DataPilotFieldGroupBy, grouping is performed on date or time.
• If true is set, Step contains a value greater than or equal to 1, and GroupBy set to DataPilotFieldGroupBy::DAYS, grouping is performed on ranges of days (see descriptions for XDataPilotFieldGrouping::createDateGroup for more details about day grouping).

Example: With HasAutoStart set to false, Start set to 2, and Step set to 3, the first group will contain all values greater than or equal to 2 and less than 5. The second group will contain all values greater than or equal to 5 and less then 8, and so on.

The returned object is an instance of DataPilotFieldGroups. The collection of groups can be modified by inserting, removing, replacing, or renaming single groups or item names in the groups. When writing back this struct containing such a changed collection of groups to the DataPilotField::GroupInfo property, the modified grouping settings are applied at the DataPilot field.