Below is the gridview with 3 columns and column 1 has panel scrollbar for each item/row:
Column 1     |   Column 2   |    Column 3 
 ---------------------------------------------------
 12345   ↑     |                    |
 14323         |                    |
 43345         |                     |
 45678         |                     |
             ↓     |                    |
 -------------------------------------
3333     ↑     |                    | 
 32123         |                    |
 544444        |                    |
 99088          |                   |
             ↓     |
 -------------------------------------
 
The code on aspx is working well, but I don't want to use it in aspx.
 
<asp:TemplateField>
<HeaderStyle   Width ="215px" Font-Names ="Tahoma" Font-Size ="9pt" />
<ItemStyle  Width ="215px" />
<ItemTemplate>
              
<asp:Panel ID="Panel1"
Runat="Server"
ScrollBars="Auto"
Height="30px"
Width="212px" >
     
<asp:Label ID="numbers"
Runat="Server"
Font-Names="tahoma"
Font-Size="8pt"
style="line-height: 10px; "
Text='<%# Eval("miscnumbers") %>'></asp:Label>
     
</asp:Panel>
</ItemTemplate>
<HeaderTemplate  >
Column 1
</HeaderTemplate>
</asp:TemplateField>
So,  I have a datatable in codebehind show as :
 Private Sub GetNumbers()
       
            'Create Table Manually
            Dim dt As New DataTable()
            'Add Columns to DataTable
            dt.Columns.Add("Column 1", GetType(String))
            dt.Columns.Add("Column 2", GetType(String))
            dt.Columns.Add("Column 3", GetType(String))
            ' and add the DataTable rows and load the values from numbers/description
           ' in the gridview
            For Each Info In Numbers
                Dim dr As DataRow = dt.NewRow()
                dr("Column 1") = Info.miscnumbers
                dr("Column 2") = Info.Fnumbers
                dr("Column 3") = Info.Description
                dt.Rows.Add(dr)
            Next
              gridview1.DataSource = dt
              gridview1.DataBind()
        
            Dim bfield As New BoundField()
            bfield.HeaderText = "Column 1"
            bfield.HeaderStyle.Width = "175"
        ---->    bfield.ItemStyle.scrollbar.FindControl(column1)   ???????   (a panel with scrollbar inside of item gridview of thecolumn 1
            bfield.DataField = "miscnumbers"
            gridview1.Font.Bold = False
            gridview1.AutoGenerateColumns = False
            gridview1.Columns.Add(bfield)
End sub
 
How to add  dynamically <asp:panel>  scrollbar for the Column1  in the code behind.
Your help is much appreciated.  Thanks.