Public Class DDCell 

public class DDCell 

'specify a font for a range of cells
Dim sb As New Workbook()
sb.Sheets.AddNew()
Dim start As DDCell = sb.Sheets(0).Cell(0, 0)
Dim end As DDCell = sb.Sheets(0).Cell(1, 2)
sb.Sheets(0).Cells(start, [end]).FontName = "Comic sans ms"

Workbook sb = new Workbook();
sb.Sheets.AddNew();
DDCell start = sb.Sheets[0].Cell(0, 0);
DDCell end = sb.Sheets[0].Cell(1, 2);
sb.Sheets[0].Cells(start, end).FontName = "Comic sans ms";