Alternative Solution to DLookup
Public Function ESQLLookup(strField As String, strTable As String, Optional Criteria As Variant, _ Optional OrderClause As Variant) As Variant Dim rs As ADODB.Recordset 'To retrieve the value to find. Dim rsMVF As ADODB.Recordset 'Child recordset to use for multi-value fields. Dim varResult As Variant 'Return value for function. Dim strSQL As String 'SQL statement. Dim strOut As String 'Output string to build up (multi-value field.) Dim lngLen As Long 'Length of string. Const strcSep = "," 'Separator between items in multi-value list. 'Initialize to null. varResult = Null 'Encapsulate Domain in brackets if none exist to allow special characters in the Domain string If Left$(strTable, 1) <> "[" Then strTable = "[" & strTable & "]" End If 'Build the SQL string. strSQL = "SELECT TOP 1 " & strField & " FROM " & strTable If Not IsMissing(Criteria) Then strSQL = strSQL & " WHERE " & Criteria End If If Not IsMissing(OrderClause) Then strSQL = strSQL & " ORDER BY " & OrderClause End If strSQL = strSQL & ";" 'Lookup the value. OpenMyRecordset rs, strSQL, rrOpenForwardOnly, rrLockReadOnly, True If rs.RecordCount > 0 Then 'Will be an object if multi-value field. If VarType(rs(0)) = vbObject Then Set rsMVF = rs(0).Value Do While Not rsMVF.EOF If rs(0).Type = 101 Then 'dbAttachment strOut = strOut & rsMVF!FileName & strcSep Else strOut = strOut & rsMVF![Value].Value & strcSep End If rsMVF.MoveNext Loop 'Remove trailing separator. lngLen = Len(strOut) - Len(strcSep) If lngLen > 0& Then varResult = Left(strOut, lngLen) End If Set rsMVF = Nothing Else 'Not a multi-value field: just return the value. varResult = rs(0) End If End If rs.Close 'Assign the return value. ESQLLookup = varResult ErrEx.Catch 11 ' Division by Zero Debug.Print strSQL MsgBox "To troubleshoot this error, please evaluate the data that is being processed by:" _ & vbCrLf & vbCrLf & strSQL, vbCritical, "Division by Zero Error" ErrEx.CatchAll MsgBox "Error " & err.Number & ": " & err.Description, vbCritical, "Unexpected error" ErrEx.Finally Set rs = Nothing End Function
Source: accessexperts.com