private void SetColumnsWidths()
{
if (Columns.Count >= 4)
{
Columns[0].Width = (int) ( Width*.25 );
Columns[1].Width = (int) ( Width*.25 );
Columns[2].Width = (int) ( Width*.15 );
Columns[3].Width = Width - ( Columns[0].Width + Columns[1].Width + Columns[2].Width );
}
}