t GroupBy( _
      ByVal iSortIndex As Integer, _
      ByVal bState As Boolean _
   )
   If (pbValidSortIndex(iSortIndex)) Then
      If Not (m_tSort(iSortIndex).Group = bState) Then
         m_tSort(iSortIndex).Group = bState
         m_bGridMatch = False
      End If
   End If
End Property
   
Public Property Get SortOrder( _
      ByVal iSortIndex As Integer _
   ) As ECGSortOrderConstants
Attribute SortOrder.VB_Description = "Gets/sets the order to sort in for the
 specified index."
   SortOrder = m_tS