Should be easy - Filling a List box across forms

I have process where I am getting the information from form1 and passing items to form2...not an issue there.  Then when I am done with form2, I want to repopulate a Listbox from SqlServer with the data that I just added in Form2.  I only want this repopulation to occure when I close form2.

Here is the Form2 code

...
Private WithEvents frmMain As frm_Main
Private Sub btn_AddPar_p_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btn_AddPar_p.Click
...
                GetConnection()
                SqlCon.Open()

                ' Refresh Parent Varaible List
                Dim sqlcom2 As SqlCommand = New SqlCommand("SELECT Parents " & _
                                    "FROM Recode_Parent " & _
                                    "WHERE Recodes ='" & txt_Recode_p.Text & "'", SqlCon)
                Dim reader_parent As SqlDataReader
                reader_parent = sqlcom2.ExecuteReader
                frmMain.lst_Parents1.Items.Clear()
                While reader_parent.Read
                    frmMain.lst_Parents1.Items.Add(reader_parent("Parents"))
                End While
                reader_parent.Close()

                ' Close Open Items
                SqlCon.Close()

I am trying to access item in frm_Main