How to remove a column from grid while dragging that column outside of column header section in WinForms GridGroupingControl?

//Event subscription.
this.gridGroupingControl1.TableControl.MouseDown += new MouseEventHandler(TableControl_MouseDown);
this.gridGroupingControl1.TableControl.MouseUp += new MouseEventHandler(TableControl_MouseUp);
 
//Handling the TableControl_MouseUp event.
void TableControl_MouseUp(object sender, MouseEventArgs e)
{
    GridTableControl tableControl = sender as GridTableControl;
    int rowIndex, colIndex;
    tableControl.PointToRowCol(e.Location, out rowIndex, out colIndex);
 
    GridTableCellStyleInfo style = tableControl.GetTableViewStyleInfo(rowIndex, colIndex);
    if (style.TableCellIdentity.DisplayElement.Kind != DisplayElementKind.ColumnHeader && column != null)
              this.gridGroupingControl1.TableDescriptor.VisibleColumns.Remove(column.ToString());
    column = null;
}
 
//Handling the TableControl_MouseDown event.
void TableControl_MouseDown(object sender, MouseEventArgs e)
{
    GridTableControl tableControl = sender as GridTableControl;
    GridTableCellStyleInfo style = (GridTableCellStyleInfo)tableControl.PointToTableCellStyle(new Point(e.X, e.Y));
 
    if (style.TableCellIdentity.DisplayElement.Kind == DisplayElementKind.ColumnHeader)
        column = style.TableCellIdentity.Column;
}

'Event subscription.
AddHandler gridGroupingControl1.TableControl.MouseDown, AddressOf TableControl_MouseDown
AddHandler gridGroupingControl1.TableControl.MouseUp, AddressOf TableControl_MouseUp
 
'Handling the TableControl_MouseUp event.
Private Sub TableControl_MouseUp(ByVal sender As Object, ByVal e As MouseEventArgs)
      Dim tableControl As GridTableControl = TryCast(sender, GridTableControl)
      Dim rowIndex, colIndex As Integer
             tableControl.PointToRowCol(e.Location, rowIndex, colIndex)
 
      Dim style As GridTableCellStyleInfo = tableControl.GetTableViewStyleInfo(rowIndex, colIndex)
      If style.TableCellIdentity.DisplayElement.Kind <> DisplayElementKind.ColumnHeader AndAlso column IsNot Nothing Then
              Me.gridGroupingControl1.TableDescriptor.VisibleColumns.Remove(column.ToString())
      End If
      column = Nothing
End Sub
 
'Handling the TableControl_MouseDown event.
Private Sub TableControl_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)
      Dim tableControl As GridTableControl = TryCast(sender, GridTableControl)
      Dim style As GridTableCellStyleInfo = CType(tableControl.PointToTableCellStyle(New Point(e.X, e.Y)), GridTableCellStyleInfo)
 
      If style.TableCellIdentity.DisplayElement.Kind = DisplayElementKind.ColumnHeader Then
          column = style.TableCellIdentity.Column
      End If
End Sub