Thank Scott
Sorry for letting you wait, I was ut of the office for a few days.
Here is what I did
DCount("AccountNo","tblUnique","RecordID<=" & [tblUnique].[RecordID]).
Now all this is a workaround to what I really wanted to accomplish.
What I really need is:
I have got a subform
Field1 = RecordID
Field2 = AccountNo
Field3 = Receipt
I would like to have a button that gives to each AccountNo a receipt no, meaning that if there is a few of the same AccountNo's it should all have the same Receipt #, and so on.
Ex:
AccountNo Receipt
AC22 2311
AC22 2311
FG56 2312
AC22 2311
FG56 2312
My workaround is. I append to a new table all the unique AccounNo's, with the running sum I increment a ReceiptNo for each AccountNo, then with an Update Query I Do the ReceiptNo on the Form. Its all being done in vba, so for the user its still one button, but for me my question is, Is there an easier way
Joe