Public Function RowCounter( _
  ByVal strKey As String, _
  ByVal booReset As Boolean, _
  Optional ByVal strGroupKey As String) _
  As Long
  
' Builds consecutive RowIDs in select, append or create query
' with the possibility of automatic reset.
' Optionally a grouping key can be passed to reset the row count
' for every group key.
'
' Usage (typical select query):
'   SELECT RowCounter(CStr([ID]),False) AS RowID, *
'   FROM tblSomeTable
'   WHERE (RowCounter(CStr([ID]),False) <> RowCounter("",True));
'
' The Where statement resets the counter when the query is run
' and is needed for browsing a select query.
'
' Usage (typical append query, manual reset):
' 1. Reset counter manually:
'   Call RowCounter(vbNullString, False)
' 2. Run query:
'   INSERT INTO tblTemp ( RowID )
'   SELECT RowCounter(CStr([ID]),False) AS RowID, *
'   FROM tblSomeTable;
'
' Usage (typical append query, automatic reset):
'   INSERT INTO tblTemp ( RowID )
'   SELECT RowCounter(CStr([ID]),False) AS RowID, *
'   FROM tblSomeTable
'   WHERE (RowCounter("",True)=0);
'
' 2002-04-13. Cactus Data ApS. CPH
' 2002-09-09. Str() sometimes fails. Replaced with CStr().
' 2005-10-21. Str(col.Count + 1) reduced to col.Count + 1.
' 2008-02-27. Optional group parameter added.

  Static col      As New Collection
  Static strGroup As String
  
  On Error GoTo Err_RowCounter
  
  If booReset = True Or strGroup <> strGroupKey Then
    Set col = Nothing
    strGroup = strGroupKey
  Else
    col.Add col.Count + 1, strKey
  End If
  
  RowCounter = col(strKey)
  
Exit_RowCounter:
  Exit Function
  
Err_RowCounter:
  Select Case Err
    Case 457
      ' Key is present.
      Resume Next
    Case Else
      ' Some other error.
      Resume Exit_RowCounter
  End Select

End Function

SELECT PosButtons.ID, PosButtons.Type, PosButtons.Desc, PosButtons.ButtonDesc, PosButtons.BN, PosButtons.SKU, PosButtons.Group, PosButtons.Qty, PosButtons.ForeColor, PosButtons.BackColor, ([bn]+1)-DMin("bn","posbuttons") AS BNid
FROM PosButtons
GROUP BY PosButtons.ID, PosButtons.Type, PosButtons.Desc, PosButtons.ButtonDesc, PosButtons.BN, PosButtons.SKU, PosButtons.Group, PosButtons.Qty, PosButtons.ForeColor, PosButtons.BackColor, ([bn]+1)-DMin("bn","posbuttons")
HAVING (((PosButtons.Group)=[forms]![PosButtons]![PosPanel]))
ORDER BY PosButtons.BN;