VB.NET Add only one picture

I have picture brower but open whole folder and I want to make something that open only one specyfic file wiht have name "W". I do not have idea what can I change that it will be work.

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

        Dim cboItems As New List(Of String)
        ' Dim sb As New StringBuilder
        Dim z As String
        Dim w As String
        Dim currentCountry = CType(SamochodyBindingSource.Current, DataRowView).Row.Field(Of String)("Model")
        z = cbxMarka.Text
        SamochodyDataSet0.Samochody.Where(Function(row) row.Marka = z).Select(Function(row) row.Identyfikator).ToList().ForEach(Sub(Identyfikator) cboItems.Add(Identyfikator))
        ComboBox2.DataSource = cboItems
        w = ComboBox2.Text
        MsgBox(w)


        Dim dlgOtworz As New FolderBrowserDialog
        dlgOtworz.ShowNewFolderButton = False
        lbxPliki.Items.Clear()
        Me.Text = "Przeglądarka"
        If dlgOtworz.ShowDialog = DialogResult.OK Then
            Folder = dlgOtworz.SelectedPath
            Dim plik As FileInfo
            Dim katalog As New DirectoryInfo(dlgOtworz.SelectedPath)
            listaP = katalog.GetFiles("*.jpg")
            If listaP.Length < 1 Then
                MessageBox.Show("W wybranym folderze brak JPG", "Uwaga", MessageBoxButtons.OK, MessageBoxIcon.Information)
            Else
                For Each plik In listaP
                    lbxPliki.Items.Add(plik.Name)
                Next
            End If
        End If
    End Sub