Dim _xl As New Excel.Application
Dim _xlBook As Excel.Workbook
Dim _xlSheet1 As Excel.Worksheet
_xlBook = _xl.Workbooks.Open("fullpathtothefile.xls")
_xlSheet1 = _xlBook.WorkSheets(1)
_xlSheet1.Rows("1:1").RowHeight = 100
_xlSheet1.Columns(1).ColumnWidth = 15
_xlSheet1.Columns(2).ColumnWidth = 34
Do you see the difference?