主题：[求助]自定义函数中定义参数问题（已解决）

原来是在动态表达式一章

Dim e As object = args(0)
Dim lbs As String = args(1) '类别列
Dim bhs As String = args(2) '编号列

Select e.DataCol.Name
    Case lbs
        If e.DataRow.IsNull(lbs) Then
            e.DataRow(bhs) = Nothing
        Else
            Dim lb As String = e.DataRow(lbs)
            If e.DataRow(bhs).StartsWith(lb) = False '如果单据编号前缀不符
                Dim max As String
                Dim idx As Integer
                max = e.DataTable.Compute("Max(编号)","类别 = '" & lb & "' And [_Identify] <> " & e.DataRow("_Identify")) '取得该类别的最大编号

                ——以上代码中 编号 和类别怎么使用？——
                If max > "" Then '如果存在最大编号
                    idx = CInt(max.Substring(2,3)) + 1 '获得最大编号的后三位顺序号,并加1
                Else
                    idx = 1 '否则顺序号等于1
                End If
                e.DataRow(bhs) = lb & Format(idx,"000")
            End If
        End If
End Select