How transfer result collection to parent form?

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VB

Hello!
There is a "Class FrCercaRapport" - this is FORM
At this class there is method:

Public Overrides Sub Nuovo()
            MyBase.Nuovo()
            Dim wFrRapportoEdit As FrRapportoEditor = New FrRapportoEditor(mOperatoreApp)
            AddHandler wFrRapportoEdit.Closed, AddressOf DialogFormHandler

            wFrRapportoEdit.ShowDialog()

        End Sub

This method calls to "Class FrRapportoEditor" where calls method:

Private Sub POk_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btSalva.Click

That method wRapporto.Insert() returns objects "{Smouse.Repository.Client.Objects.Rapporto}"

I want to get this object at parent Class FrCercaRapport, for this i make next:

Dim dForm As FrRapportoEditor = CType(sender, FrRapportoEditor)
search(dForm.wRapporto)

But it is not work