Viv,

>For some reason this seems to work:

>       void m_Grid_ColumnDividerDoubleClick(object sender, DataGridViewColumnDividerDoubleClickEventArgs e)
>        {
>            m_Grid.AutoResizeColumn(e.ColumnIndex, DataGridViewAutoSizeColumnMode.DisplayedCells);
>            e.Handled = true;
>        }

thank you very much.
This solves the issue.
You are genious.