Sub FillColBlanks_Offset()
'by Rick Rothstein  2009-10-24
'fill blank cells in column with value above
'http://www.contextures.com/xlDataEntry02.html

  Dim Area As Range, LastRow As Long
  On Error Resume Next
  LastRow = Cells.Find(What:="*", SearchOrder:=xlRows, _
               SearchDirection:=xlPrevious, _
               LookIn:=xlFormulas).Row
  For Each Area In ActiveCell.EntireColumn(1).Resize(LastRow). _
               SpecialCells(xlCellTypeBlanks).Areas
    Area.Value = Area(1).Offset(-1).Value
  Next
End Sub