B4J Question Help needed opening XML file

#Region Project Attributes
    #MainFormWidth: 600
    #MainFormHeight: 600
#End Region

Sub Process_Globals
    Private fx As JFX
    Private MainForm As Form
    Private xui As XUI
    Private btnFileDialog As Button
    Private fc As FileChooser
    Private parser As SaxParser
    Private f As String
End Sub

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    MainForm.RootPane.LoadLayout("Layout1")
    MainForm.Show
    MainForm.Title = "Convert .fpl To *.fms"
End Sub

Sub Parser_StartElement (Uri As String, Name As String, Attributes As Attributes)

End Sub

Sub Parser_EndElement (Uri As String, Name As String, Text As StringBuilder)
    If parser.Parents.IndexOf("item") > -1 Then
        If Name = "waypoint" Then
            Log(Text.ToString)
        End If
    End If
End Sub

Sub btnFileDialog_Click
    fc.Initialize
    fc.InitialDirectory = "C:\Documents\3DGarmin430"
    fc.setExtensionFilter("ForeFlightImage", Array As String("*.fpl"))
    f = fc.ShowOpen(MainForm)
    Log(f)

    Dim in As InputStream
    in = File.OpenInput(File.DirAssets, f) 'This file was added with the file manager.
    parser.Parse(f, "Parser") '"Parser" is the events subs prefix.
    in.Close
   
End Sub