Code:
Dim reader As System.IO.StreamReader
Dim filename As String = "exp-easy.txt"
reader = System.IO.File.OpenText(filename)
textbox1.Text = reader.ReadToEnd
reader.Close()
Here, this will get you started. This will open a textfile named exp-easy.txt and load it into a textbox. Adapt it to suit your needs.
I code at http://tech.reboot.pro