一、问题描述：

      当报表的数据来源是一个交叉表时，由于字段名无法确定，就无法直接生成报表。

二、解决方案：

    先生成一个报表模板，对于无法确定的字段标题预定义一个，在报表中对字段不绑定，通过报表的open事件来解决字段绑定。

   下面是解决一个报表，最后两列最近的两个月份：

Private Sub Report_Open(cancel As Integer)
    
    Dim db As DAO.Database
    Dim q As QueryDef
           
    Set db = CurrentDb
    Set q = db.QueryDefs(Me.RecordSource)
   
    Dim i As Integer
    Dim thisMonth, preMonth As String
    Dim iStatus As Integer
        
    thisMonth = get本月年月字串()
    preMonth = get上月年月字串()
    
    iStatus = 0
    For i = q.Fields.Count - 1 To 0 Step -1
        If q.Fields(i).Name = thisMonth Then
            本月.ControlSource = thisMonth
            iStatus = iStatus + 1
            lb本月充气量.Caption = thisMonth & vbCrLf & "充气量"
        Else
            If q.Fields(i).Name = preMonth Then
                上月.ControlSource = preMonth
                iStatus = iStatus + 1
                lb上月充气量.Caption = preMonth & vbCrLf & "充气量"
            End If
        End If
        
        If iStatus >= 2 Then
           Exit For
        End If
    Next i
    Set q = Nothing   
End Sub

Public Function get本月年月字串()
    get本月年月字串 = get日期年月字串(Date)
End Function


Public Function get上月年月字串()
    get上月年月字串 = get日期年月字串(GetPreMonthFirstDay())
End Function


Public Function get日期年月字串(d As Date)
    get日期年月字串 = CStr(Year(d) * 100 + Month(d))
End Function


Public Function GetPreMonthFirstDay()
    GetPreMonthFirstDay = DateSerial(Year(Date), Month(Date) - 1, 1)
End Function