Codejock's help :

Example
[Visual Basic] This sample illustrates how to sort the columns in the ReportControl. If you had 8 columns added to the ReportControl, this sample would sort the columns first by the column at Itemindex 7, then by the column at ItemIndex 2, then by the column at ItemIndex 5.

    'This code below will add three columns to the SortOrder collection of coluns.
    'This will cause the columns in the ReportControl to first be sorted by column 7,
    'which has an index of zero (0) in the SortOrder collection. Columns are first sorted
    'in the order that they are added to the SortOrder collection.

    wndReportControl.SortOrder.Add wndReportControl.Columns(7)
    wndReportControl.SortOrder.Add wndReportControl.Columns(2)
    wndReportControl.SortOrder.Add wndReportControl.Columns(5)

    'This will cause the column at index 1 of the SortOrder collection to be sorted
    'in descending order.
    wndReportControl.SortOrder(1).SortAscending = False

    'Any time you add or delete columns to the SortOrder or GroupOrder collections,
    'the Populate method must be called to show the changes in the ReportControl's view.

    wndReportControl.Populate

Example
[Visual Basic] This sample illustrates how to remove all columns from the ReportControl's collection of SortOrder and GroupOrder columns.

    'Removes all columns from the ReportControl's GroupsOrder collection
    wndReportControl.GroupsOrder.DeleteAll

    'Removes all columns from the ReportControl's SortOrder collection
    wndReportControl.SortOrder.DeleteAll