假期牌友出了点小事，没牌打了，太热了不想出门

想着还有个问题没解决，试验了一下，应该没错误，完了做个记录

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'客户加一个结账时间区分字段,对应ENDDAY
Public Function MonthlyByDate(Ddate As Date, Optional EndDay As Integer = 25)    '默认25日
    On Error Resume Next
    If EndDay = 31 Then  '把31当成正常月底统计
        MonthlyByDate = DateSerial(Year(Ddate), Month(Ddate), 1)
    Else
        If Day(Ddate) > EndDay Then
            MonthlyByDate = DateSerial(Year(Ddate), Month(Ddate) + 1, 1)
        Else
            MonthlyByDate = DateSerial(Year(Ddate), Month(Ddate), 1)
        End If
    End If
End Function
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