In Solidworks 2012

Help me, How to get equition------IF(`Dn`=159;`Dn`;`Dn`)

follow code, don't find equition?

Sub del()

   Dim SwApp As SldWorks.SldWorks, SwModel As ModelDoc2

        Set SwApp = Application.SldWorks

        Set SwModel = SwApp.ActiveDoc

   Dim SwSelMgr As SelectionMgr, ii, jj

        Set SwSelMgr = SwModel.SelectionManager

   Dim SwTabAnn As TableAnnotation, SwBomTab As BomTableAnnotation

        Set SwTabAnn = SwSelMgr.GetSelectedObject5(1)

        Set SwBomTab = SwTabAnn

        With SwTabAnn

            For jj = 0 To .ColumnCount

               Debug.Print .Text(0, jj),

               Debug.Print .GetColumnTitle(jj),

               Debug.Print SwBomTab.GetColumnCustomProperty(jj),

               Debug.Print SwBomTab.GetColumnUseTitleAsPartNumber(jj)

            Next jj

        End With

        ss = SwBomTab.GetAllCustomProperties

End Sub

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