FailedNo error information available: E_NOINTERFACE(0x80004002).

用COM+ 的自动事务，必须操作的对象支持，用access 调用dtc，会有莫名其妙的错误代码

FailedNo error information available: E_NOINTERFACE(0x80004002).

关于这个问题，微软有一片kb

http://support.microsoft.com/default.aspx?scid=KB;EN-US;Q221071& 

 <WebMethod(transactionOption:=EnterpriseServices.TransactionOption.RequiresNew)> _
    Public Function HelloWorld() As String
        Try
            ContextUtil.EnableCommit()

            DrawMoneyFromA(1000)
            DepostMoneyToB(1000)
            ContextUtil.SetComplete()
            Return "OK!"
        Catch ex As Exception
            ContextUtil.SetAbort()
            Return "Failed" + ex.Message
        End Try

    End Function

    Public Sub DrawMoneyFromA(ByVal amount As Long)
        '从 A 中提取一定的钱
        Dim cnn As New OleDb.OleDbConnection(Me.OleDbConnection1.ConnectionString)
        cnn.Open()
        Dim cmd As New OleDb.OleDbCommand("Update bank set amount=amount - " & amount & " where bankaccount='A'", cnn)
        cmd.ExecuteNonQuery()

    End Sub

    Public Sub DepostMoneyToB(ByVal amount As Long)
        '从 B 加一定的钱
        Dim cnn As New OleDb.OleDbConnection(Me.OleDbConnection1.ConnectionString)
        cnn.Open()
        Dim cmd As New OleDb.OleDbCommand("Update bank set amount=amount + " & amount & " where bankaccount='B'", cnn)
        'Throw New Exception("ff")
        cmd.ExecuteNonQuery()

    End Sub

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