Всетаки получилось самому, что хотелось:
Dim pID As New UID<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
        Dim pApp As IApplication
        Dim pEditor As IEditor
        Dim pEnumFeature As IEnumFeature
        pID = "esriCore.Editor"
        Set pApp = Application
        Set pEditor = pApp.FindExtensionByCLSID(pID)
        Set pEnumFeature = pEditor.EditSelection
        pEnumFeature.Reset
        Dim myFEATURE As Ifeature
        Set myFEATURE = pEnumFeature.Next
        j = myFEATURE.Fields.FindField("PODVID") 
        myFEATURE.Value(j) = podvid