Reading from a INI file: How?

Ok, for the last 5 hours Ive been struggling to read from a INI file but still havent gotten anything.
Writing I can do fine, but reading is the problem.
I also wanna know if there are other functions for ini, like Delete or Anything else, other then Get and Write
This is what I have so far:

  

Import System.IO
    Public Declare Function WritePrivateProfileStringA Lib "kernel32.dll" (ByVal lpApplicationName As String, ByVal lpKeyName As String, ByVal lpString As String, ByVal lpFileName As String) As Long
    Public Declare Function GetPrivateProfileStringA Lib "kernel32.dll" (ByVal lpApplicationName As String, ByVal lpKeyName As String, ByVal lpDefault As String, ByVal lpReturnedString As String, ByVal nSize As Long, ByVal lpFileName As String) As Long

    Public str_filepath As String
    Public str_section As String
    Public str_key As String
    Public str_target As String

    Private Sub btnReadINI_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnReadINI.Click

        str_filepath = txtPathINI.Text
        str_section = txtSectionINI.Text
        str_key = txtKeyINI.Text
        str_target = txtValueINI.Text

        If Not File.Exists(str_filepath) Then
            MsgBox("File NOT found!!" & vbNewLine & str_filepath)
            Exit Sub
        End If

        str_key = Space(100)
        str_key = Microsoft.VisualBasic.Left(str_key, GetPrivateProfileStringA(str_section, str_key, "", str_target, Len(str_key), str_filepath))

        txtValueINI.Text = str_key

    End Sub

On the Function declaration, it had variables declared as Any, but the VS didnt recgonized them, marking them with that colored underline, so I put as string.
Please someone help me on this! Ive trying other codes from forums, and even a class lib, but nothing worked...
Do I need to import something especial

Thanks!! :)