Fire Snake, thanks for the repy

The following is the code you gave me, I have a question about it

Code:
Public Class Form1


    Private Sub BtBrowse_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtBrowse.Click

        Dim DirInfo As New DirectoryInfo("C;\")
        Dim files() As FileInfo = DirInfo.GetFiles("*.*")

        For Each file As FileInfo In files
            ListBox1.Items.Add(file.Name & Enviroment.NewLine())
        Next

    End Sub

End Class
My erro box tells me that:
Type 'DirectoryInfo' is not defined
Type 'FileInfo' is not defined
Type 'FileIno' is not defined

Please understand that I am very new to this. I am using Visual Basic 2008 if this makes a difference between VB.net as you identivied the version in your post reply.

I am not sure what I am missing or what I am doing wrong.

Thanks