my English is very weak, do not intend much.
I created the class below:

Public Class MyComparer
    Implements IComparer
    #Region "IComparer Members"

    Private Function IComparer_Compare(x As Object, y As Object) As Integer Implements IComparer.Compare
        Dim xCell As UltraGridCell = TryCast(x, UltraGridCell)
        Dim yCell As UltraGridCell = TryCast(y, UltraGridCell)

        If xCell = yCell Then
            Return 0
        End If

        If xCell Is Nothing Then
            Return 1
        ElseIf yCell Is Nothing Then
            Return -1
        End If

        Dim xString As String = xCell.Row.Cells("text Column").Text
        Dim yString As String = yCell.Row.Cells("text Column").Text

        Return xString.CompareTo(yString)
    End Function

    #End Region
End Class

in which event and how I'll make this comparison

I'll talk about that situation a lot of work.
I managed to solve more
Thank you Mike

The solution I like:

If e.Row.Column.Index = 1 Then
            If e.Row.Rows(0).IsGroupByRow = False Then
                If e.Row.Rows.Count = 1 Then
                    e.Row.Description = "Situação : " & e.Row.Rows(0).Cells("Status").Text & " (" & e.Row.Rows.Count & " Item)"
                ElseIf e.Row.Rows.Count >= 2 Then
                    e.Row.Description = "Situação : " & e.Row.Rows(0).Cells("Status").Text & " (" & e.Row.Rows.Count & " Itens)"
                End If
            Else
                For Each rowPrincipal As UltraGridRow In e.Row.Rows
                    If rowPrincipal.IsGroupByRow = True Then
                        Dim row As UltraGridRow
                        row = rowPrincipal.GetChild(ChildRow.First)
                        e.Row.Description = "Situação : " & row.Cells("Status").Text & " (" & e.Row.Rows.Count & " Itens)"
                    End If
                Next
            End If
        End If

Hi,

You will only be able to get the value of the hidden column from a data row, not from a GroupByRow. So if you can have multiple levels of grouping, you will have to walk down to a level that is not grouped.

So you can check e.Row.Rows[0].IsGroupByRow. If it is a GroupByRow, then you will have to cast it to a GroupByRow and check if it's first child row is a GroupByRow. Keep walking down the chain until you get to a row that is NOT a GroupByRow and then you should be able to access the value of the hidden column.

Run in a way.
In the event InitializeGroupByRow When I group any of the columns in the 1st time ever works. More when I go to group the 2nd column gives error.
I've tried several ways to do this does not happen anymore I did not find any.

I did not meet the GroupByRow in InitializeGroupByRow

If e.Row.Column.Key = "Icon" Then
       If e.Row.Rows.Count = 1 Then
              e.Row.Description = "Status : " & e.Row.Rows.Item(0).Cells("Status").Text & " (" & e.Row.Rows.Count & " Item)"
       ElseIf e.Row.Rows.Count >= 2 Then
              e.Row.Description = "Status : " & e.Row.Rows.Item(0).Cells("Status").Text & " (" & e.Row.Rows.Count & " Itens)"
       End If
End If

There are a couple of way to do this.

One way would be to use handle the InitializeGroupByRow event. This event passes you the GroupByRow, so you won't be able to get the Value of the hidden column directly, since the GroupByRow has no columns.

What you have to do is get the child rows to get to the columns. So you can use the Rows collection on the GroupByRow to get it's child rows. If there's only one level of grouping, then this is very easy and you can just use the first row (e.GroupByRow.Rows[0]). You can then get the value from the hidden cell in that row.

A second option would be to use a GroupByEvaluator in addition to (or in place or) the SortComparer. The GroupByEvaluator allows you to essentially override the "Value" of the cell for the purposes of grouping. So you would return the hidden cell's value instead of the actual cell value. This would make it easier to get the hidden cell value from the GroupByRow, because the value would be returned directly from the Value property of the GroupByRow.

The Problem of the column title I managed to solve. Thanks for your patience Mike

Now the other issue is still a big problem.
Look.
I compared the image column to another hidden column to the grouping to work. I need the property description of the event InitializeGroupByRow assume the value of the hidden column.