Matt,

I can think of quicker ways. Merging, Sorting, etc.. But here's the quick
and ugly. Not sure how it'll perform over 32000 rows - probably poorly.

Assumes data is in columns A and B and that XXXXX is written to column C

Sub testit()
Dim wksS As Worksheet, wksD As Worksheet
Dim i As Long, j As Long, lngLastRowS As Long, lngLastRowD As Long
Dim blnFound As Boolean

Set wksS = Sheet2
Set wksD = Sheet1

lngLastRowS = wksS.Cells(Rows.Count, 1).End(xlUp).Row
lngLastRowD = wksD.Cells(Rows.Count, 1).End(xlUp).Row
For i = 1 To lngLastRowS
blnFound = False
For j = 1 To lngLastRowD
If wksS.Cells(i, 1) = wksD.Cells(j, 1) And wksS.Cells(i, 2) =
wksD.Cells(j, 2) Then
blnFound = True
Exit For
End If
Next
If Not blnFound Then wksS.Cells(i, 3) = "XXXXX"
Next
End Sub

Rob


"Matt" wrote in message
...

I'm trying to over come a problem of slow looping, I have 2 sheets both
of
which have about 32,000 rows when I use a macro with loops it takes for
ever
to find the entries that are on one sheet but not on another. I have
tried
the formala below and have tried to adapt it to suit my needs but can not
get it to work. My two sheets have two columns and both of them havve to
match. In the example below I need to isolate the row with the xxxxxx
beside it. I has invoice numbers that are on the other sheet and the same
amount but the combination of invoice number and amount is unique. All the
other pairs have a match on the other sheet. Any help would be greatly
appreciatied.


=IF(COUNTIF($A$1:$A$10,B1)=0,B1,"")





sheet1 sheet 2

inv number amount invoice no amount


104546 $ 250.25 154265 $ 4,625.00
451567 $ 1,000.25 254256 $ 1,456.45
254256 $ 1,456.45 451567 $ 25.60
451453 $ 65,452.00 XXXXXXX 154265 $ 25.60 XXXXX
654245 $ 450.96 451453 $ 65,452.00
324154 $ 6,542.25 654245 $ 450.96
154265 $ 4,625.00 104546 $ 250.25
451567 $ 25.60 324154 $ 6,542.25
654245 $ 1,456.20 654245 $ 1,456.20
254256 $ 250.25 254256 $ 250.25
324154 $ 1,000.25 451567 $ 1,000.25
451567 $ 25.60 324154 $ 1,000.25
451567 $ 25.60



Matt